JP2016090570A - Method for separation of object material by using magnetic silica particles - Google Patents

Method for separation of object material by using magnetic silica particles Download PDF

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JP2016090570A
JP2016090570A JP2015204214A JP2015204214A JP2016090570A JP 2016090570 A JP2016090570 A JP 2016090570A JP 2015204214 A JP2015204214 A JP 2015204214A JP 2015204214 A JP2015204214 A JP 2015204214A JP 2016090570 A JP2016090570 A JP 2016090570A
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silica particles
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magnetic silica
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JP6773402B2 (en
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隆啓 北川
Takahiro Kitagawa
隆啓 北川
黒川 祐人
Sukehito Kurokawa
祐人 黒川
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Sanyo Chemical Industries Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a method for separation of a biological material by using magnetic silica particles, which enables quick separation of the biological material.SOLUTION: In a material separation method, a material (D) to be separated in a specimen (E) is separated by using magnetic silica particles (C) produced by fixing a material (G) which tends to bond to the material (D) to be separated, to the surfaces of magnetic silica particles (B) which contain magnetic metal oxidate particles (A) and silica (L), where the content of the magnetic metal oxidate particles (A) is 60 to 95 wt.% relative to weight of the total weight of the magnetic metal oxidate particles (A) and the silica (L). Preferably, the separation method includes a process in which a specimen (E1) containing a target material (D1) is brought into contact with the magnetic silica particles (C) to form a composite (F1) of the magnetic silica particles (C) and the target material (D1), and thereafter the target material (D1) is separated and obtained from the specimen (E1) by separating the target material (D1) from the composite (F1) separated by magnetic force.SELECTED DRAWING: None

Description

本発明は、磁性シリカ粒子を用いた対象物質の分離方法に関する。 The present invention relates to a method for separating a target substance using magnetic silica particles.

従来、タンパク質等の生物由来物質を試料から分離する方法として、カラムクロマトグラフィーを用いた精製法が行われている。しかしながら、カラムクロマトグラフィー法による精製法は、タンパク質等を大量かつ高純度に精製するためには巨大なカラムや大量のバッファーを必要とし、さらに精製に長い時間を必要とするため、コストが高くなるといった問題がある。 Conventionally, a purification method using column chromatography has been performed as a method for separating biological substances such as proteins from a sample. However, the purification method by the column chromatography method requires a huge column and a large amount of buffer in order to purify proteins and the like in a large amount and with a high purity, and further requires a long time for the purification, resulting in an increase in cost. There is a problem.

また、近年磁力によって容易に分離、回収が可能であることから、磁性粒子を用いたタンパク質の精製が行われている。例えば非特許文献1及び特許文献1には、酸化鉄と有機高分子からなる磁性粒子が記載されている。しかし、これらの磁性粒子は、含有する磁性体の量が少なく、磁場による粒子の集磁回収に時間がかかり、生体関連物質の精製にかかる時間は十分満足のいくものではない。 In recent years, protein can be purified using magnetic particles because it can be easily separated and recovered by magnetic force. For example, Non-Patent Document 1 and Patent Document 1 describe magnetic particles made of iron oxide and an organic polymer. However, these magnetic particles contain a small amount of magnetic material, and it takes time to collect and collect magnetic particles by a magnetic field, and the time required to purify biological materials is not fully satisfactory.

迅速に磁力で粒子を回収することを目的として、特許文献2には、磁性体の含有率を高めた磁性シリカ粒子が開示されている。しかしながら、これらはいずれも試料中に含まれる対象物質を検出することを目的としたものであり、試料中に含まれる対象物質を精製あるいは除去することを目的としたものではない。 For the purpose of quickly collecting particles with a magnetic force, Patent Document 2 discloses magnetic silica particles with an increased content of magnetic material. However, these are all intended to detect the target substance contained in the sample, and are not intended to purify or remove the target substance contained in the sample.

特開2007−85929号公報JP 2007-85929 A WO2012/173002パンフレットWO2012 / 173002 brochure

「磁性ビーズのバイオ・環境用途への応用展開」 、シーエムシー出版、2006年4月28日発行"Application development of magnetic beads for bio / environmental applications", CMC Publishing, April 28, 2006

本発明は、生物由来物質の分離を迅速に行うことができる磁性シリカ粒子を用いた生物由来物質の分離方法を提供することを目的とする。 An object of the present invention is to provide a method for separating a biological material using magnetic silica particles that can rapidly separate the biological material.

本発明者らは、上記目的を達成すべく鋭意検討した結果、本発明に到達した。即ち本発明は、磁性金属酸化物粒子(A)とシリカ(L)とを含有する磁性シリカ粒子であって、該磁性金属酸化物粒子(A)の含有量が該磁性金属酸化物粒子(A)と該シリカ(L)の合計重量に対して60〜95重量%である磁性シリカ粒子(B)の表面に、分離対象物質(D)と結合する物質(G)が固定化された磁性シリカ粒子(C)を用いて、試料(E)中の分離対象物質(D)を分離する物質の分離方法;
および抗体、抗原、DNA、RNA、細胞、ウイルス、細菌、及びタンパク質からなる群より選ばれる少なくとも1種である分離対象物質(D)と結合する物質であって分子量1000以下であり官能基(J)を有する物質(G)が、下記の磁性シリカ粒子(B)の表面に固定化された磁性シリカ粒子(C)である。
磁性シリカ粒子(B):磁性金属酸化物粒子(A)とシリカ(L)とを含有する磁性シリカ粒子であって、該磁性金属酸化物粒子(A)の含有量が該磁性金属酸化物粒子(A)と該シリカ(L)の合計重量に対して60〜95重量%である磁性シリカ粒子(B)
The inventors of the present invention have reached the present invention as a result of intensive studies to achieve the above object. That is, the present invention is a magnetic silica particle containing magnetic metal oxide particles (A) and silica (L), wherein the content of the magnetic metal oxide particles (A) is the magnetic metal oxide particles (A). ) And the silica (L), which is 60 to 95% by weight based on the total weight of the magnetic silica particles (B), the magnetic silica having the substance (G) bonded to the substance to be separated (D) immobilized thereon A method for separating a substance that separates a separation target substance (D) in a sample (E) using the particles (C);
And a substance that binds to a substance to be separated (D) that is at least one selected from the group consisting of antibodies, antigens, DNA, RNA, cells, viruses, bacteria, and proteins, and has a molecular weight of 1000 or less and a functional group (J ) Is a magnetic silica particle (C) immobilized on the surface of the following magnetic silica particle (B).
Magnetic silica particles (B): magnetic silica particles containing magnetic metal oxide particles (A) and silica (L), the content of the magnetic metal oxide particles (A) being the magnetic metal oxide particles Magnetic silica particles (B) that are 60 to 95% by weight based on the total weight of (A) and the silica (L)

本発明の分離方法においては、迅速に対象物質を分離することができる。 In the separation method of the present invention, the target substance can be quickly separated.

本発明における分離対象物質(D)とは、試料(E)中に含まれる複数の(生物由来)物質の混合物中の目的物質(D1)、あるいは試料(E)中の目的物質以外の除去対象物質(D2)を意味する。 The substance to be separated (D) in the present invention is a target substance (D1) in a mixture of a plurality of (biologically derived) substances contained in the sample (E) or a target to be removed other than the target substance in the sample (E). It means substance (D2).

本発明における目的物質(D1)としては、通常この分野で測定されるものであれば特に限定はされず、例えば血清,血液,血漿,尿等の生体体液、リンパ液、血球、各種細胞類等の生体由来の試料中に含まれるタンパク質、脂質タンパク質、核酸、免疫グロブリン、血液凝固関連因子、抗体、酵素、ホルモン、癌マーカー、心疾患マーカー及び各種薬物等が代表的なものとして挙げられる。更に具体的には、例えばアルブミン,ヘモグロビン,ミオグロビン,トランスフェリン,プロテインA,C反応性蛋白質(CRP)等のタンパク質、例えば高比重リポ蛋白質(HDL),低比重リポ蛋白質(LDL),超低比重リポ蛋白質等の脂質蛋白質、例えばデオキシリボ核酸(DNA),リボ核酸(RNA)等の核酸、例えばアルカリ性ホスファターゼ,アミラーゼ,酸性ホスファターゼ,γ−グルタミルトランスフェラーゼ(γ−GTP),リパーゼ,クレアチンキナーゼ(CK),乳酸脱水素酵素(LDH),グルタミン酸オキザロ酢酸トランスアミナーゼ(GOT),グルタミン酸ピルビン酸トランスアミナーゼ(GPT),レニン,プロテインキナーゼ(PK),チロシンキナーゼ等の酵素、例えばIgG,IgM,IgA,IgD,IgE等の免疫グロブリン(或はこれらの、例えばFc部,Fab部,F(ab)2部等の断片)、例えばフィブリノーゲン,フィブリン分解産物(FDP),プロトロンビン,トロンビン等の血液凝固関連因子、例えば抗ストレプトリジンO抗体,抗ヒトB型肝炎ウイルス表面抗原抗体(HBs抗原)、抗ヒトC型肝炎ウイルス抗体、抗リュウマチ因子等の抗体、例えば甲状腺刺激ホルモン(TSH)、甲状腺ホルモン(FT3,FT4,T3,T4)、副甲状腺ホルモン(PTH)、ヒト絨毛性ゴナドトロピン(hCG)エストラジオール(E2)等のホルモン、例えばα−フェトプロテイン(AFP)、癌胎児性抗原(CEA)、CA19−9、前立腺特異抗原(PSA)等の癌マーカー、例えばトロポニンT(TnT)、ヒト脳性ナトリウム利尿ペプチド前駆体N端フラグメント(NT−proBNP)等の心疾患マーカー、例えば抗てんかん薬、抗生物質、テオフィリン等の薬物等、例えばC型肝炎ウイルス、B型肝炎ウイルス、ヘパドナウイルス、アデノウイル、ラブドウイルス、フラビウイルス、レトロウイルス、ヘルペスウイルス、オソミクソウイルス等のウイルスや、O−157、ピロリ菌、サルモネラ菌等の細菌、例えば脂肪細胞、ES細胞、肝細胞、幹細胞、内皮細胞、上皮細胞、筋細胞、内分泌細胞、外分泌細胞、神経細胞、腫瘍細胞、IPS細胞等の細胞が挙げられる。上記したものの中でも、抗原、抗体、ホルモン、癌マーカー、心疾患マーカー等が好ましい。   The target substance (D1) in the present invention is not particularly limited as long as it is usually measured in this field, and examples thereof include biological fluids such as serum, blood, plasma, urine, lymph fluid, blood cells, various cells and the like. Typical examples include proteins, lipid proteins, nucleic acids, immunoglobulins, blood coagulation-related factors, antibodies, enzymes, hormones, cancer markers, heart disease markers, and various drugs contained in biological samples. More specifically, for example, proteins such as albumin, hemoglobin, myoglobin, transferrin, protein A, C-reactive protein (CRP), such as high density lipoprotein (HDL), low density lipoprotein (LDL), ultra low density lipo Lipid proteins such as proteins, such as nucleic acids such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), such as alkaline phosphatase, amylase, acid phosphatase, γ-glutamyltransferase (γ-GTP), lipase, creatine kinase (CK), lactic acid Enzymes such as dehydrogenase (LDH), glutamate oxaloacetate transaminase (GOT), glutamate pyruvate transaminase (GPT), renin, protein kinase (PK), tyrosine kinase, such as IgG, IgM, IgA, I Blood coagulation-related factors such as immunoglobulins such as gD and IgE (or fragments thereof such as Fc part, Fab part and F (ab) 2 part) such as fibrinogen, fibrin degradation product (FDP), prothrombin and thrombin For example, anti-streptolysin O antibody, anti-human hepatitis B virus surface antigen antibody (HBs antigen), anti-human hepatitis C virus antibody, anti-rheumatic factor antibody, such as thyroid stimulating hormone (TSH), thyroid hormone (FT3) FT4, T3, T4), parathyroid hormone (PTH), hormones such as human chorionic gonadotropin (hCG) estradiol (E2), such as α-fetoprotein (AFP), carcinoembryonic antigen (CEA), CA19-9, prostate Cancer markers such as specific antigen (PSA), such as troponin T (TnT), human Heart disease markers such as essential natriuretic peptide precursor N-terminal fragment (NT-proBNP), drugs such as antiepileptic drugs, antibiotics, theophylline, etc., such as hepatitis C virus, hepatitis B virus, hepadnavirus, adenovirus , Viruses such as rhabdovirus, flavivirus, retrovirus, herpes virus, ostomyxovirus, and bacteria such as O-157, H. pylori, and Salmonella, such as adipocytes, ES cells, hepatocytes, stem cells, endothelial cells, epithelial cells , Muscle cells, endocrine cells, exocrine cells, nerve cells, tumor cells, IPS cells and the like. Among those described above, antigens, antibodies, hormones, cancer markers, heart disease markers and the like are preferable.

本発明における除去対象物質(D2)は、試料(E)中に含まれる物質の中で目的物質(D1)を除いた物質のうち少なくとも一つを意味する。例えば、試料(E)が血清であり、血清中に含まれる癌胎児性抗原(CEA)を目的物質(D1)とする場合、通常血清中に含まれる他の成分、例えばタンパク質、アルブミン、抗原、抗体、脂質、無機物等のうち少なくとも一つが除去対象物質(D2)である。   The substance to be removed (D2) in the present invention means at least one of substances contained in the sample (E) excluding the target substance (D1). For example, when the sample (E) is serum and the carcinoembryonic antigen (CEA) contained in the serum is the target substance (D1), other components usually contained in the serum, such as protein, albumin, antigen, At least one of the antibody, lipid, inorganic substance and the like is the substance to be removed (D2).

本発明における分離対象物質(D)と結合する物質(G)は、目的物質(D1)あるいは除去対象物質(D2)と結合する物質であれば特に限定されない。物質(G)と目的物質(D1)あるいは除去対象物質(D2)との結合は特異的であっても非特異的であってもよいが、より純度の高い目的物質(D1)を得るためには、目的物質(D1)と物質(G)との結合は特異的であることが好ましく、また除去対象物質(D2)と物質(G)との結合は非特異的であることが好ましい。   The substance (G) that binds to the separation target substance (D) in the present invention is not particularly limited as long as it is a substance that binds to the target substance (D1) or the removal target substance (D2). The binding between the substance (G) and the target substance (D1) or the removal target substance (D2) may be specific or non-specific, but in order to obtain a target substance (D1) with higher purity. The binding between the target substance (D1) and the substance (G) is preferably specific, and the binding between the substance to be removed (D2) and the substance (G) is preferably nonspecific.

本発明における目的物質(D1)あるいは除去対象物質(D2)と特異的に結合する物質(G)としては、例えば「抗原」−「抗体」間反応、「糖鎖」−「タンパク質」間反応、「糖鎖」−「レクチン」間反応、「酵素」−「インヒビター」間反応、「タンパク質」−「ペプチド鎖」間反応又は「染色体又はヌクレオチド鎖」−「ヌクレオチド鎖」間反応、「ヌクレオチド鎖」−「タンパク質」間反応等の相互反応によって分離対象物質と結合するもの等が挙げられ、上記各組合せに於いて何れか一方が目的物質(D1)あるいは除去対象物質(D2)である場合、他の一方が目的物質(D1)あるいは除去対象物質(D2)と特異的に結合する物質(G)である。例えば、目的物質(D1)が「抗原」であるときは、目的物質(D1)と結合する物質(G)は「抗体」であり、目的物質(D1)が「抗体」であるときは目的物質(D1)と結合する物質(G)は「抗原」である(以下、その他の上記各組合せにおいても同様である)。 Examples of the substance (G) that specifically binds to the target substance (D1) or the substance to be removed (D2) in the present invention include an “antigen”-“antibody” reaction, a “sugar chain”-“protein” reaction, "Sugar chain"-"lectin" reaction, "enzyme"-"inhibitor" reaction, "protein"-"peptide chain" reaction or "chromosome or nucleotide chain"-"nucleotide chain" reaction, "nucleotide chain" -Those that bind to the substance to be separated by mutual reaction such as reaction between "proteins", etc., and any one of the above combinations is the target substance (D1) or the substance to be removed (D2). Is a substance (G) that specifically binds to the target substance (D1) or the substance to be removed (D2). For example, when the target substance (D1) is “antigen”, the substance (G) that binds to the target substance (D1) is “antibody”, and when the target substance (D1) is “antibody”, the target substance The substance (G) that binds to (D1) is an “antigen” (the same applies to the other combinations described above).

具体的には、例えばヌクレオチド鎖(オリゴヌクレオチド鎖、ポリヌクレオチド鎖);染色体;ペプチド鎖(例えばC−ペプチド、アンジオテンシンI等)、タンパク質〔例えばプロカルシトニン、免疫グロブリンA(IgA),免疫グロブリンE(IgE),免疫グロブリンG(IgG),免疫グロブリンM(IgM),免疫グロブリンD(IgD),β2−ミクログロブリン、アルブミン、これらの分解産物、フェリチン等の血清タンパク質〕;酵素〔例えばアミラーゼ(例えば膵型,唾液腺型,X型等)、アルカリホスファターゼ(例えば肝性,骨性,胎盤性,小腸性等)、酸性ホスファターゼ(例えばPAP等)、γ−グルタミルトランスファラーゼ(例えば腎性,膵性,肝性等)、リパーゼ(例えば膵型,胃型等)、クレアチンキナーゼ(例えばCK−1,CK−2,mCK等)、乳酸脱水素酵素(例えばLDH1〜LDH5等)、グルタミン酸オキザロ酢酸トランスアミナーゼ(例えばASTm,ASTs等)、グルタミン酸ピルビン酸トランスアミナーゼ(例えばALTm,ALTs等)、コリンエステラーゼ(例えばChE1〜ChE5等)、ロイシンアミノペプチダーゼ(例えばC−LAP,AA,CAP等)、レニン、プロテインキナーゼ、チロシンキナーゼ等〕及びこれら酵素のインヒビター,ホルモン(例えばPTH,TSH,インシュリン,LH,FSH,プロラクチン等)、レセプター(例えばエストロゲン,TSH等に対するレセプター);リガンド(例えばエストロゲン,TSH等);例えば細菌(例えば結核菌,肺炎球菌,ジフテリア菌,髄膜炎菌,淋菌,ブドウ球菌,レンサ球菌,腸内細菌,大腸菌,ヘリコバクター・ピロリ等)、ウイルス(例えばルベラウイルス,ヘルペスウイルス,肝炎ウイルス,ATLウイルス,AIDSウイルス,インフルエンザウイルス,アデノウイルス,エンテロウイルス,ポリオウイルス,EBウイルス,HAV,HBV,HCV,HIV,HTLV等)、真菌(例えばカンジダ,クリプトコッカス等)、スピロヘータ(例えばレプトスピラ,梅毒トレポネーマ等)、クラミジア、マイコプラズマ等の微生物;当該微生物に由来するタンパク質又はペプチド或いは糖鎖抗原;気管支喘息,アレルギー性鼻炎,アトピー性皮膚炎等のアレルギーの原因となる各種アレルゲン(例えばハウスダスト、例えばコナヒョウダニ,ヤケヒョウダニ等のダニ類、例えばスギ、ヒノキ、スズメノヒエ,ブタクサ,オオアワガエリ,ハルガヤ,ライムギ等の花粉、例えばネコ,イヌ,カニ等の動物、例えば米,卵白等の食物、真菌、昆虫、木材、薬剤、化学物質等に由来するアレルゲン等);脂質(例えばリポタンパク質等);プロテアーゼ(例えばトリプシン,プラスミン,セリンプロテアーゼ等);腫瘍マーカータンパク抗原(例えばPSA,PGI,PGII等);糖鎖抗原〔例えばAFP(例えばL1からL3等)、hCG(hCGファミリー)、トランスフェリン、IgG、サイログロブリン、Decay−accelerating−factor(DAF)、癌胎児性抗原(例えばCEA,NCA,NCA−2,NFA等)、CA19−9、PIVKA−II、CA125、前立腺特異抗原、癌細胞が産生する特殊な糖鎖を有する腫瘍マーカー糖鎖抗原、ABO糖鎖抗原等〕;糖鎖(例えばヒアルロン酸、β−グルカン、上記糖鎖抗原等が有する糖鎖等);糖鎖に結合するタンパク質(例えばヒアルロン酸結合タンパク、βグルカン結合タンパク等);リン脂質(例えばカルジオリピン等);リポ多糖(例えばエンドトキシン等);化学物質(例えばT3,T4,例えばトリブチルスズ,ノニルフェノール,4−オクチルフェノール,フタル酸ジ−n−ブチル,フタル酸ジシクロヘキシル,ベンゾフェノン,オクタクロロスチレン,フタル酸ジ−2−エチルヘキシル等の環境ホルモン);人体に投与・接種される各種薬剤及びこれらの代謝物;アプタマー;核酸結合性物質;およびこれらに対する抗体等が挙げられる。尚、本発明に於いて用いられる抗体には、パパインやペプシン等の蛋白質分解酵素、或いは化学的分解により生じるFab、F(ab’)2フラグメント等の分解産物も包含される。   Specifically, for example, nucleotide chain (oligonucleotide chain, polynucleotide chain); chromosome; peptide chain (for example, C-peptide, angiotensin I, etc.), protein [for example, procalcitonin, immunoglobulin A (IgA), immunoglobulin E ( IgE), immunoglobulin G (IgG), immunoglobulin M (IgM), immunoglobulin D (IgD), β2-microglobulin, albumin, degradation products thereof, serum proteins such as ferritin]; enzyme [eg amylase (eg pancreatic type) , Salivary gland type, type X, etc.), alkaline phosphatase (eg, hepatic, osseous, placental, small intestine, etc.), acid phosphatase (eg, PAP), γ-glutamyltransferase (eg, renal, pancreatic, hepatic, etc.) ), Lipase (eg pancreatic type, stomach type, etc.), creatine kina (E.g., CK-1, CK-2, mCK, etc.), lactate dehydrogenase (e.g., LDH1-LDH5, etc.), glutamate oxaloacetate transaminase (e.g., ASTm, ASTs, etc.), glutamate pyruvate transaminase (e.g., ALTm, ALTs, etc.) ), Cholinesterase (eg, ChE1-ChE5), leucine aminopeptidase (eg, C-LAP, AA, CAP, etc.), renin, protein kinase, tyrosine kinase, etc.) and inhibitors of these enzymes, hormones (eg, PTH, TSH, insulin, etc.) LH, FSH, prolactin, etc.), receptor (eg, receptor for estrogen, TSH, etc.); ligand (eg, estrogen, TSH, etc.); eg, bacteria (eg, tuberculosis, pneumococci, diphtheria, meningitis) , Neisseria gonorrhoeae, Staphylococcus, Streptococcus, Enterobacteriaceae, Escherichia coli, Helicobacter pylori, etc.), viruses (eg, rubella virus, herpes virus, hepatitis virus, ATL virus, AIDS virus, influenza virus, adenovirus, enterovirus, poliovirus) , EB virus, HAV, HBV, HCV, HIV, HTLV, etc.), fungi (eg, Candida, cryptococcus, etc.), spirochetes (eg, leptospira, syphilis treponema, etc.), chlamydia, mycoplasma, etc .; a protein or peptide derived from the microorganism Or sugar chain antigens; various allergens that cause allergies such as bronchial asthma, allergic rhinitis, atopic dermatitis (eg house dust, mites such as white mite, mite, etc., eg It is derived from pollen of Japanese cedar, Japanese cypress, Japanese cypress, ragweed, blue-necked frog, hargaya, rye, etc., such as animals such as cats, dogs, crabs, etc., food such as rice, egg white, fungi, insects, wood, drugs, chemicals, etc. Lipids (eg, lipoproteins); proteases (eg, trypsin, plasmin, serine proteases, etc.); tumor marker protein antigens (eg, PSA, PGI, PGII, etc.); sugar chain antigens (eg, AFP (eg, L1 to L3, etc.) ), HCG (hCG family), transferrin, IgG, thyroglobulin, decay-accelerating-factor (DAF), carcinoembryonic antigen (eg CEA, NCA, NCA-2, NFA, etc.), CA19-9, PIVKA-II, CA125 , Prostate specific antigen, cancer Tumor marker sugar chain antigen, ABO sugar chain antigen, etc. having special sugar chains produced by cells]; sugar chains (eg, hyaluronic acid, β-glucan, sugar chains possessed by the above sugar chain antigens, etc.); bound to sugar chains Proteins (eg, hyaluronic acid binding protein, β-glucan binding protein, etc.); phospholipids (eg, cardiolipin, etc.); lipopolysaccharides (eg, endotoxins, etc.); Environmental hormones such as di-n-butyl acid, dicyclohexyl phthalate, benzophenone, octachlorostyrene, di-2-ethylhexyl phthalate); various drugs administered and inoculated to the human body and their metabolites; aptamers; nucleic acid binding properties Substances; and antibodies against them. The antibodies used in the present invention include proteolytic enzymes such as papain and pepsin, and degradation products such as Fab and F (ab ') 2 fragments generated by chemical degradation.

本発明における、磁性シリカ粒子(B)に目的物質(D1)あるいは除去対象物質(D2)と特異的に結合する物質(G)を固定化する方法としては、磁性シリカ粒子(B)に担持用物質を物理吸着させる方法が挙げられるが、より効率良く担持用物質を固定化させる観点から、グルタルアルデヒド、アルブミン、カルボジイミド、ストレプトアビジン、ビオチン及び官能基を有するアルキルアルコキシシラン(H)からなる群から選ばれる少なくとも1種の有機化合物(K)を磁性シリカ粒子(B)の表面に結合させ、それらを介して担持用物質を磁性シリカ粒子(B)に固定化させるのが好ましい。これらの有機化合物の内、特定の担持用物質を結合させる観点から、官能基を有するアルキルアルコキシシラン(H)が更に好ましい。   In the present invention, as a method of immobilizing the target substance (D1) or the substance (G) that specifically binds to the removal target substance (D2) on the magnetic silica particles (B), the method is supported on the magnetic silica particles (B). Although the method of physically adsorbing a substance can be mentioned, from the viewpoint of immobilizing the supporting substance more efficiently, glutaraldehyde, albumin, carbodiimide, streptavidin, biotin and a functional group-containing alkylalkoxysilane (H) It is preferable that at least one organic compound (K) selected is bonded to the surface of the magnetic silica particles (B), and the supporting substance is immobilized on the magnetic silica particles (B) through them. Of these organic compounds, alkylalkoxysilane (H) having a functional group is more preferable from the viewpoint of bonding a specific supporting substance.

上記アルキルアルコキシシラン(H)が有する官能基としては、アミノ基、カルボキシル基、水酸基、メルカプト基、グリシジルオキシ基及び炭素数が1〜18の炭化水素基等が挙げられ、アルキルアルコキシシラン1分子中に異なる種類の官能基を有していてもよい。   Examples of the functional group possessed by the alkylalkoxysilane (H) include an amino group, a carboxyl group, a hydroxyl group, a mercapto group, a glycidyloxy group, and a hydrocarbon group having 1 to 18 carbon atoms. May have different types of functional groups.

磁性シリカ粒子(B)の表面に官能基を有するアルキルアルコキシシラン(H)を結合させる方法としては、後述する磁性シリカ粒子(B)を作製する際の(アルキル)アルコキシシランとして、前述のアミノ基、カルボキシル基、水酸基、メルカプト基グリシジルオキシ基又は炭素数が1〜18の炭化水素基で置換されたアルキル基を有するアルキルアルコキシシランを使用する方法や、これらの置換基を有しない(アルキル)アルコキシシランを使用して磁性シリカ粒子(B)を作製した後、磁性シリカ粒子(B)をアミノ基、カルボキシル基、水酸基、メルカプト基グリシジルオキシ基又は炭素数が1〜18の炭化水素基で置換されたアルキル基を有するアルキルアルコキシシランで処理する方法等が挙げられる。   As a method for bonding the alkylalkoxysilane (H) having a functional group to the surface of the magnetic silica particle (B), the above-mentioned amino group can be used as the (alkyl) alkoxysilane for producing the magnetic silica particle (B) described later. , A method using an alkylalkoxysilane having an alkyl group substituted with a carboxyl group, a hydroxyl group, a mercapto group glycidyloxy group or a hydrocarbon group having 1 to 18 carbon atoms, or an (alkyl) alkoxy having no such substituent After producing magnetic silica particles (B) using silane, the magnetic silica particles (B) are substituted with amino groups, carboxyl groups, hydroxyl groups, mercapto groups glycidyloxy groups, or hydrocarbon groups having 1 to 18 carbon atoms. And a method of treating with an alkylalkoxysilane having an alkyl group.

後者の方法の具体例としては、磁性シリカ粒子(B)をその濃度が0.1〜50重量%になるように溶媒に分散し、この分散液にアミノ基、カルボキシル基、水酸基、メルカプト基、グリシジルオキシ基又は炭素数が1〜18の炭化水素基で置換されたアルキル基を有するアルキルアルコキシシランの溶液を添加して、室温で加水分解反応及び縮合反応を行う方法が挙げられる。   As a specific example of the latter method, the magnetic silica particles (B) are dispersed in a solvent so that the concentration thereof is 0.1 to 50% by weight, and an amino group, a carboxyl group, a hydroxyl group, a mercapto group, Examples thereof include a method of adding a solution of an alkylalkoxysilane having a glycidyloxy group or an alkyl group substituted with a hydrocarbon group having 1 to 18 carbon atoms, and performing a hydrolysis reaction and a condensation reaction at room temperature.

この方法における溶媒は、用いるアルキルアルコキシシランの溶解性に応じて適宜選択され、水に可溶なアミノ基、カルボキシル基、水酸基又はメルカプト基で置換されたアルキル基を有するアルキルアルコキシシランを用いる場合は、水又は水−アルコールの混合溶媒等を用いることが好ましく、水に溶解しにくいグリシジルオキシ基で置換されたアルキル基を有するアルキルアルコキシシランを用いる場合、酢酸ブチル等を用いることが好ましい。   The solvent in this method is appropriately selected according to the solubility of the alkylalkoxysilane used, and when an alkylalkoxysilane having an alkyl group substituted with an amino group, carboxyl group, hydroxyl group or mercapto group soluble in water is used. It is preferable to use water, a mixed solvent of water-alcohol, or the like. When using an alkylalkoxysilane having an alkyl group substituted with a glycidyloxy group that is difficult to dissolve in water, it is preferable to use butyl acetate or the like.

アミノ基、カルボキシル基、水酸基、メルカプト基、グリシジルオキシ基又は炭素数が1〜18の炭化水素基で置換されたアルキル基を有するアルキルアルコキシシランの使用量は、磁性シリカ粒子(B)に対して0.01重量%以上であることが好ましい。0.01重量%未満であると、磁性シリカ粒子(B)の表面に導入される官能基数が十分でない場合がある。   The amount of the alkylalkoxysilane having an amino group, a carboxyl group, a hydroxyl group, a mercapto group, a glycidyloxy group or an alkyl group substituted with a hydrocarbon group having 1 to 18 carbon atoms is used with respect to the magnetic silica particles (B). It is preferable that it is 0.01 weight% or more. If it is less than 0.01% by weight, the number of functional groups introduced onto the surface of the magnetic silica particles (B) may not be sufficient.

グルタルアルデヒド、アルブミン、カルボジイミド、ストレプトアビジン又はビオチンを磁性シリカ粒子(B)の表面に結合させる方法は特に限定されないが、例えば、以下のようにして結合させることができる。
アルデヒド基を有するグルタルアルデヒド及びカルボキシル基を有するビオチンは、アミノ基を有するアルキルアルコキシシランが表面に結合した磁性シリカ粒子(B)と反応させることで、磁性シリカ粒子(B)の表面に結合させることができる。また、アミノ基を有するアルブミン及びストレプトアビジン並びにカルボジイミド基を有するカルボジイミドは、カルボキシル基を有するアルキルアルコキシシランが表面に結合した磁性シリカ粒子(B)と反応させることで、磁性シリカ粒子(B)の表面に結合させることができる。
The method for binding glutaraldehyde, albumin, carbodiimide, streptavidin, or biotin to the surface of the magnetic silica particle (B) is not particularly limited, and for example, it can be bound as follows.
Glutaraldehyde having an aldehyde group and biotin having a carboxyl group are bonded to the surface of the magnetic silica particle (B) by reacting the alkyl alkoxysilane having an amino group with the magnetic silica particle (B) bonded to the surface. Can do. Further, albumin and streptavidin having an amino group and carbodiimide having a carbodiimide group are reacted with magnetic silica particles (B) to which alkyl alkoxysilane having a carboxyl group is bonded to the surface, thereby the surface of the magnetic silica particles (B). Can be combined.

本発明における目的物質(D1)あるいは除去対象物質(D2)と非特異的に結合する物質(G)としては、共有結合、水素結合、疎水性相互作用、イオン結合等によって目的物質(D1)あるいは除去対象物質(D2)と結合する官能基(J)を有するものが挙げられる。水溶液中で迅速かつ強固に結合することから、官能基(J)としてはアミノ基あるいはアンモニウム基を有するものが特に好ましい。 As the target substance (D1) or the substance (G) that nonspecifically binds to the target substance (D1) in the present invention, the target substance (D1) or the like by covalent bond, hydrogen bond, hydrophobic interaction, ionic bond, etc. What has a functional group (J) couple | bonded with the removal target substance (D2) is mentioned. Those having an amino group or an ammonium group are particularly preferred as the functional group (J) because they bond quickly and firmly in an aqueous solution.

アミノ基あるいはアンモニウム基としては、1〜3級アミノ基、第4級アンモニウム基が含まれる。
1級アミノ基としては、例えばアミノ基、アミノメチル基、アミノエチル基、アミノプロピル基等のアミノアルキル基、3−アミノ−1−エトキシプロピル基、1−アミノ−エトキシメチル基等のアミノアルコキシアルキル基等が挙げられる。
2級アミノ基としては、1つの炭化水素基で置換されたアミノ基が挙げられる。例えば、N−アルキルアミノアルキル基が含まれ、N−メチルアミノエチル基、N−エチルアミノエチル基等のN−アルキルアミノアルキル基、イミダゾイル基等が挙げられる。
3級アミノ基としては、2つの炭化水素基で置換されたアミノ基が挙げられる。3級アミノ基を有する官能基としては、例えばN−ジメチルアミノエチル基、N−ジメチルアミノプロピル基、N−ジエチルアミノエチル基、N−ジブチルアミノエチル基等が挙げられる。
第4級アンモニウム基としては、3つの炭化水素基で置換されたアンモニウム基が挙げられる。4級アンモニウム基を有する官能基としては、トリメチルアンモニウム基、トリエチルアンモニウム基等のトリアルキルアンモニウム基等が挙げられる。
1〜3級アミノ基は、酸との塩になっていてもよい。酸としては、塩酸、臭酸、ヨウ酸、酢酸、硫酸、硝酸及びリン酸等が挙げられる。
第4級アンモニウム基は、水酸化物又は酸との塩になっていてもよい。酸としては塩酸、臭酸、ヨウ酸、酢酸、硫酸、硝酸及びリン酸等が挙げられる。
The amino group or ammonium group includes a primary to tertiary amino group and a quaternary ammonium group.
Examples of the primary amino group include aminoalkyl groups such as amino group, aminomethyl group, aminoethyl group and aminopropyl group, and aminoalkoxyalkyl such as 3-amino-1-ethoxypropyl group and 1-amino-ethoxymethyl group. Groups and the like.
The secondary amino group includes an amino group substituted with one hydrocarbon group. For example, N-alkylaminoalkyl groups are included, and N-alkylaminoalkyl groups such as N-methylaminoethyl group and N-ethylaminoethyl group, imidazolyl groups and the like can be mentioned.
The tertiary amino group includes an amino group substituted with two hydrocarbon groups. Examples of the functional group having a tertiary amino group include an N-dimethylaminoethyl group, an N-dimethylaminopropyl group, an N-diethylaminoethyl group, and an N-dibutylaminoethyl group.
Examples of the quaternary ammonium group include an ammonium group substituted with three hydrocarbon groups. Examples of the functional group having a quaternary ammonium group include trialkylammonium groups such as a trimethylammonium group and a triethylammonium group.
The primary to tertiary amino group may be a salt with an acid. Examples of the acid include hydrochloric acid, odorous acid, iodic acid, acetic acid, sulfuric acid, nitric acid, and phosphoric acid.
The quaternary ammonium group may be a salt with a hydroxide or an acid. Examples of the acid include hydrochloric acid, odorous acid, iodic acid, acetic acid, sulfuric acid, nitric acid, and phosphoric acid.

アミノ基あるいはアンモニウム基を含有する物質(G)を磁性粒子に固定化させる方法としては、(i)1〜3級アミノ基又は第4級アンモニウム基含有物質と混合する方法、(ii)1〜3級アミノ基又は第4級アンモニウム基含有化合物を反応させる方法が挙げられる。
(i)1〜3級アミノ基又は第4級アンモニウム基含有化合物を混合する方法
磁性シリカ粒子(B)と1〜3級アミノ基又は第4級アンモニウム基含有化合物を溶媒中で混合することで、磁性シリカ粒子(B)のヒドロキシル基及び/又はカルボキシル基と1〜3級アミノ基又は第4級アンモニウム基含有化合物との間にイオン結合が形成し、磁性シリカ粒子(B)にアミノ基あるいはアンモニウム基を含有させることができる。
この方法(i)で使用できる1級アミノ基含有化合物としては、アミノメタン、アミノエタン等のアミノアルカン及びこの塩、ジアミノエタン等のジアミノアルカン(アルキレンジアミン)及びこの塩、リジン、アルギニン等の塩基性アミノ酸及びこの塩が挙げられる。
2級アミノ基含有化合物としては、ジメチルアミン等の2つの炭化水素基で置換されたアミン及びこの塩、2−メチルイミダゾール、ヒスチジン等のイミダゾール類及びこの塩が挙げられる。
3級アミノ基含有化合物としては、トリメチルアミン、トリエチルアミン等の3つの炭化水素基で置換されたアミン及びこの塩が挙げられる。
第4級アンモニウム基含有化合物としては、テトラメチルアンモニウム、テトラエチルアンモニウム等の4つの炭化水素で置換されたアンモニウム及びこの塩が挙げられる。
溶媒としては1〜3級アミノ基又は第4級アンモニウム基含有化合物を溶解するものであれば特に制限はないが、安全性の観点から水が好ましい。
溶媒と混合する際の1〜3級アミノ基又は第4級アンモニウム基含有化合物の使用量としては、混合する磁性シリカ粒子(B)の重量を基準として、1〜3級アミノ基又は第4級アンモニウム基含有化合物の使用量が0.01〜10mmol/gの範囲であることが好ましい。この1〜3級アミノ基又は第4級アンモニウム基含有化合物の使用量の範囲を満たす観点から、1〜3級アミノ基又は第4級アンモニウム基含有化合物の使用量は、溶媒の体積を基準として、1〜1,000mmol/Lが好ましい。
混合する温度には制限がなく、5〜50{さらに好ましくは20〜30}℃が好ましい。
混合装置としては、特に制限はないが、市販のマグネチックスターラー、メカニカルスターラー等が使用できる。回転数としては、溶媒の容量にもよるが、通常300rpm以下である。
Examples of the method for immobilizing the amino group- or ammonium group-containing substance (G) on the magnetic particles include (i) a method of mixing with a primary to tertiary amino group or quaternary ammonium group-containing substance, and (ii) 1 to 1 The method of making a tertiary amino group or a quaternary ammonium group containing compound react is mentioned.
(I) Method of mixing a primary to tertiary amino group or quaternary ammonium group-containing compound Magnetic silica particles (B) and a primary to tertiary amino group or quaternary ammonium group-containing compound are mixed in a solvent. An ionic bond is formed between the hydroxyl group and / or carboxyl group of the magnetic silica particle (B) and the compound containing the primary to tertiary amino group or quaternary ammonium group, and the magnetic silica particle (B) has an amino group or An ammonium group can be contained.
Primary amino group-containing compounds that can be used in this method (i) include aminoalkanes such as aminomethane and aminoethane and salts thereof, diaminoalkanes (alkylenediamines) such as diaminoethane and salts thereof, basics such as lysine and arginine. Examples include amino acids and salts thereof.
Examples of the secondary amino group-containing compound include amines substituted with two hydrocarbon groups such as dimethylamine and salts thereof, imidazoles such as 2-methylimidazole and histidine, and salts thereof.
Examples of the tertiary amino group-containing compound include amines substituted with three hydrocarbon groups such as trimethylamine and triethylamine, and salts thereof.
Examples of the quaternary ammonium group-containing compound include ammonium substituted with four hydrocarbons such as tetramethylammonium and tetraethylammonium, and salts thereof.
The solvent is not particularly limited as long as it dissolves the primary to tertiary amino group- or quaternary ammonium group-containing compound, but water is preferable from the viewpoint of safety.
The amount of the primary to tertiary amino group or quaternary ammonium group-containing compound used when mixing with the solvent is based on the weight of the magnetic silica particles (B) to be mixed, based on the primary to tertiary amino groups or quaternary. The amount of the ammonium group-containing compound used is preferably in the range of 0.01 to 10 mmol / g. From the viewpoint of satisfying the range of the use amount of the first to third class amino group or quaternary ammonium group-containing compound, the use amount of the first to third class amino group or quaternary ammonium group-containing compound is based on the volume of the solvent. 1 to 1,000 mmol / L is preferable.
There is no restriction | limiting in the temperature to mix, 5-50 {more preferably 20-30} degreeC is preferable.
Although there is no restriction | limiting in particular as a mixing apparatus, A commercially available magnetic stirrer, mechanical stirrer, etc. can be used. The number of rotations is usually 300 rpm or less although it depends on the capacity of the solvent.

(ii)1〜3級アミノ基又は第4級アンモニウム基含有化合物を反応させる方法
1級アミノ基含有化合物を反応させる方法としては、例えば、アルキレンジアミンと磁性シリカ粒子(B)のヒドロキシル基及び/又はカルボキシル基とを反応させる方法が挙げられ、例えば、カルボキシル基を予めカルボジイミド化合物と反応させ、アシルイソ尿素{R’−N=C(OCOR)−NH−R’(−OCORが(A)に由来する部分)}を得た後、アルキレンジアミンをこのアシルイソ尿素に加えることによって、磁性シリカ粒子(B)に1級アミノ基含有化合物をアミド結合できる。1級アミノ基含有化合物の結合量は、生物由来物質の分離能の観点から、磁性シリカ粒子(B)の重量を基準として、0.01〜10mmol/gが好ましい。
(Ii) Method of reacting a primary to tertiary amino group or quaternary ammonium group-containing compound As a method of reacting a primary amino group-containing compound, for example, alkylenediamine and hydroxyl groups of magnetic silica particles (B) and / or Or a method of reacting with a carboxyl group, for example, reacting a carboxyl group with a carbodiimide compound in advance, and acylisourea {R′—N═C (OCOR) —NH—R ′ (—OCOR is derived from (A) After obtaining the portion)}, the primary amino group-containing compound can be amide-bonded to the magnetic silica particles (B) by adding alkylene diamine to the acylisourea. The binding amount of the primary amino group-containing compound is preferably 0.01 to 10 mmol / g based on the weight of the magnetic silica particles (B) from the viewpoint of the separation ability of the biological substance.

2級アミノ基含有化合物を反応させる方法としては、例えば、N−アルキルアミノアルキルアミンと磁性シリカ粒子(B)のヒドロキシル基及び/又はカルボキシル基とを反応させる方法が挙げられ、例えば、カルボキシル基を予めカルボジイミド化合物と反応させ、アシルイソ尿素{R’−N=C(OCOR)−NH−R’(−OCORが(A)に由来する部分)}を得た後、N−アルキルアミノアルキルアミンをこのアシルイソ尿素に加えることによって、磁性シリカ粒子(B)に2級アミノ基含有化合物をアミド結合できる。2級アミノ基含有化合物の結合量は、生物由来物質の分離能の観点から、磁性シリカ粒子(B)の重量を基準として、0.01〜10mmol/gが好ましい。 Examples of the method of reacting the secondary amino group-containing compound include a method of reacting the N-alkylaminoalkylamine with the hydroxyl group and / or carboxyl group of the magnetic silica particles (B). After reacting with a carbodiimide compound in advance to obtain acylisourea {R′—N═C (OCOR) —NH—R ′ (the portion where —OCOR is derived from (A))}, N-alkylaminoalkylamine is converted to this By adding to acylisourea, a secondary amino group-containing compound can be amide-bonded to the magnetic silica particles (B). The binding amount of the secondary amino group-containing compound is preferably 0.01 to 10 mmol / g, based on the weight of the magnetic silica particles (B), from the viewpoint of the separation ability of the biological substance.

3級アミノ基含有化合物を反応させる方法としては、例えば、N−ジアルキルアミノアルキルクロリドと磁性シリカ粒子(B)のヒドロキシル基及び/又はカルボキシル基とを反応させる方法が挙げられ、NaOH(水酸化ナトリウム)存在下、水溶液中で反応させることで、磁性シリカ粒子(B)のカルボキシル基とエステル結合、又は磁性シリカ粒子(B)のヒドロキシル基とエーテル結合することができる。 Examples of the method of reacting the tertiary amino group-containing compound include a method of reacting N-dialkylaminoalkyl chloride with the hydroxyl group and / or carboxyl group of the magnetic silica particles (B), and NaOH (sodium hydroxide). ) In the presence of an aqueous solution, the carboxyl group of the magnetic silica particles (B) and the ester bond, or the hydroxyl group of the magnetic silica particles (B) can be ether-bonded.

第4級アンモニウム基含有化合物を反応させる方法としては、例えば、N−グリシジル−トリアルキルアンモニウムクロリドと磁性シリカ粒子(B)のカルボキシル基又はヒドロキシル基とを反応させる方法が挙げられ、4級アンモニウム塩触媒存在下、水溶液中で反応させることで、磁性シリカ粒子(B)のカルボキシル基とエステル結合、又は磁性シリカ粒子(B)のヒドロキシル基とエーテル結合することができる Examples of the method of reacting the quaternary ammonium group-containing compound include a method of reacting N-glycidyl-trialkylammonium chloride with the carboxyl group or hydroxyl group of the magnetic silica particles (B), and a quaternary ammonium salt. By reacting in an aqueous solution in the presence of a catalyst, the carboxyl group and ester bond of the magnetic silica particle (B) or the ether group and the hydroxyl group of the magnetic silica particle (B) can be formed.

官能基(J)の含有量(mmol/g)は、生物由来物質の分離能の観点から、磁性シリカ粒子(B)1g当たり、0.01〜10mmol/gが好ましく、さらに好ましくは0.05〜5mmol/gである。 The content (mmol / g) of the functional group (J) is preferably 0.01 to 10 mmol / g, more preferably 0.05, per 1 g of the magnetic silica particles (B) from the viewpoint of the ability to separate biological substances. ~ 5 mmol / g.

官能基(J)の含有量は、次の方法により測定される。
0.02gの磁性シリカ粒子(C)の試料に0.1mol/Lの塩酸水溶液10mLを加え、25℃10分間静置した後、磁石で磁性シリカ粒子(C)を集磁し、液体部分をピペットで取り除く。その後、10mLの脱イオン水を洗浄液として加え、25℃で10分間静置した後、磁石で磁性シリカ粒子(C)を集磁し、液体部分をピペットで取り除く。この脱イオン水で洗浄する操作をさらに2回繰り返す。その後、10重量%の硫酸ナトリウム水溶液10mlを加え、25℃で10分間静置した後、磁石で磁性シリカ粒子(C)を集磁し、液体部分をピペットで取り出し、この液体部分を全自動波長分散型蛍光X線分析装置(装置名:Axiosメーカー名:PANalytical社製)で塩素イオン含量を定量する。この定量された塩素イオン量が、試料中の官能基(J)の量に等しいとして、官能基(J)の含有量を算出する。
The content of the functional group (J) is measured by the following method.
After adding 10 mL of 0.1 mol / L hydrochloric acid aqueous solution to a sample of 0.02 g of magnetic silica particles (C) and allowing to stand at 25 ° C. for 10 minutes, the magnetic silica particles (C) are collected with a magnet, and the liquid portion is removed. Remove with a pipette. Thereafter, 10 mL of deionized water is added as a washing liquid, and the mixture is allowed to stand at 25 ° C. for 10 minutes. Then, the magnetic silica particles (C) are collected with a magnet, and the liquid portion is removed with a pipette. This operation of washing with deionized water is repeated twice more. After that, 10 ml of 10% by weight aqueous sodium sulfate solution was added, and the mixture was allowed to stand at 25 ° C. for 10 minutes. Then, magnetic silica particles (C) were collected with a magnet, and the liquid part was taken out with a pipette. Chlorine ion content is quantified with a dispersive X-ray fluorescence analyzer (device name: Axios manufacturer name: manufactured by PANalytical). Assuming that the quantified chlorine ion amount is equal to the amount of the functional group (J) in the sample, the content of the functional group (J) is calculated.

本発明における磁性シリカ粒子(B)は、磁性金属酸化物粒子(A)がシリカ(L)のマトリックス中に磁性金属酸化物粒子(A)とシリカ(L)の合計重量に対して60〜95重量%分散された球体である。さらにその表面に、非磁性体からなる物質(M)を有していてもよい。   The magnetic silica particles (B) in the present invention are 60 to 95 with respect to the total weight of the magnetic metal oxide particles (A) and silica (L) in the matrix of the magnetic metal oxide particles (A) being silica (L). Spheres dispersed in weight percent. Furthermore, the surface may have a substance (M) made of a non-magnetic material.

非磁性体からなる物質(M)としては、分離対象物質(D)と結合する物質(G)を固定化することができれば特に限定されず、例えばチオール基等との結合を介して固定化できる金、白金、パラジウム等の重金属、表面水酸基を介して固定化できる無機酸化物、あるいは側鎖の官能基を介して固定化できるポリマー等が挙げられる。上記の中で、より強固な結合で物質(G)を固定化できる点から、無機酸化物あるいはポリマーが好ましい。 The substance (M) made of a non-magnetic material is not particularly limited as long as the substance (G) that binds to the substance to be separated (D) can be immobilized. For example, the substance (M) can be immobilized via a bond with a thiol group or the like. Examples thereof include heavy metals such as gold, platinum, and palladium, inorganic oxides that can be immobilized through surface hydroxyl groups, and polymers that can be immobilized through functional groups in the side chain. Among the above, an inorganic oxide or a polymer is preferable from the viewpoint that the substance (G) can be fixed with a stronger bond.

磁性金属酸化物粒子(A)としては、鉄、コバルト、ニッケル及びこれらの合金等の酸化物が挙げられるが、磁界に対する感応性が優れていることから、酸化鉄が特に好ましい。磁性金属酸化物粒子(A)は、1種を単独で用いても2種以上を併用してもよい。   Examples of the magnetic metal oxide particles (A) include oxides such as iron, cobalt, nickel, and alloys thereof, and iron oxide is particularly preferable because of its excellent sensitivity to magnetic fields. Magnetic metal oxide particles (A) may be used alone or in combination of two or more.

酸化鉄としては、公知の種々の酸化鉄を用いることができる。酸化鉄の内、特に化学的な安定性に優れることから、マグネタイト、γ−ヘマタイト、マグネタイト−α−ヘマタイト中間酸化鉄及びγ−ヘマタイト−α−ヘマタイト中間酸化鉄が好ましく、大きな飽和磁化を有し、外部磁場に対する感応性が優れていることから、マグネタイトが更に好ましい。
本発明における磁性金属酸化物粒子(A)は、フェリ磁性、強磁性、あるいは超常磁性であってよい。上記の中でも、磁気分離後に残留磁化が残らず迅速に再分散させることが可能な超常磁性が好ましい。ここで超常磁性とは、外部磁場の存在下で物質の個々の原子磁気モーメントが整列し誘発された一時的な磁場を示し、外部磁場を取り除くと、部分的な整列が損なわれ磁場を示さなくなることをいう。
As iron oxide, various known iron oxides can be used. Among iron oxides, magnetite, γ-hematite, magnetite-α-hematite intermediate iron oxide and γ-hematite-α-hematite intermediate iron oxide are preferred because of their excellent chemical stability, and have a large saturation magnetization. Magnetite is more preferable because of its excellent sensitivity to an external magnetic field.
The magnetic metal oxide particles (A) in the present invention may be ferrimagnetic, ferromagnetic, or superparamagnetic. Among these, superparamagnetism that can be rapidly redispersed without residual magnetization remaining after magnetic separation is preferable. Superparamagnetism refers to a temporary magnetic field that is induced by aligning individual atomic magnetic moments of a substance in the presence of an external magnetic field. When the external magnetic field is removed, partial alignment is lost and no magnetic field is shown. That means.

磁性金属酸化物粒子(A)の体積平均粒子径は、好ましくは1〜50nm、より好ましくは1〜30nm、さらに好ましくは1〜20nmである。(A)の体積平均粒子径が1nm以上の場合は合成が容易であり、体積平均粒子径が50nm以下の場合はシリカのマトリックスに均一に分散させることが容易である。 The volume average particle diameter of the magnetic metal oxide particles (A) is preferably 1 to 50 nm, more preferably 1 to 30 nm, and still more preferably 1 to 20 nm. When the volume average particle diameter of (A) is 1 nm or more, synthesis is easy, and when the volume average particle diameter is 50 nm or less, it is easy to uniformly disperse in a silica matrix.

本発明における磁性金属酸化物粒子(A)の体積平均粒子径は、任意の200個の磁性金属酸化物について走査型電子顕微鏡で観察して測定された粒子径の平均値である。磁性金属酸化物粒子(A)の体積平均粒子径は、後述の磁性金属酸化物粒子(A)作製時の金属イオン濃度を調節することにより制御することができる。また、通常の分級等の方法によっても磁性金属酸化物粒子(A)の体積平均粒子径を所望の値にすることができる。   The volume average particle diameter of the magnetic metal oxide particles (A) in the present invention is an average value of particle diameters measured by observing an arbitrary 200 magnetic metal oxides with a scanning electron microscope. The volume average particle diameter of the magnetic metal oxide particles (A) can be controlled by adjusting the metal ion concentration at the time of producing the magnetic metal oxide particles (A) described later. Further, the volume average particle diameter of the magnetic metal oxide particles (A) can be set to a desired value also by a usual method such as classification.

磁性シリカ粒子(B)に含まれる磁性金属酸化物粒子(A)の含有量の下限は、60重量%、好ましくは70重量%であり、上限は95重量%、好ましくは80重量%である。磁性金属酸化物の含有量が60重量%未満の場合、得られた磁性シリカ粒子の磁性が十分でないため、実際の用途面における分離操作に時間がかかり、95重量%を超えるものは合成が困難である。   The lower limit of the content of the magnetic metal oxide particles (A) contained in the magnetic silica particles (B) is 60% by weight, preferably 70% by weight, and the upper limit is 95% by weight, preferably 80% by weight. When the content of the magnetic metal oxide is less than 60% by weight, the obtained magnetic silica particles are not sufficiently magnetized. Therefore, it takes time for the separation operation in actual use, and it is difficult to synthesize the ones exceeding 95% by weight. It is.

磁性金属酸化物の製造方法は、特に限定されないが、Massartにより報告されたものをベースとして水溶性鉄塩及びアンモニアを用いる共沈殿法(R.Massart,IEEE Trans.Magn.1981,17,1247)や水溶性鉄塩の水溶液中の酸化反応を用いた方法により合成することができる。   The method for producing the magnetic metal oxide is not particularly limited, but a coprecipitation method using a water-soluble iron salt and ammonia based on those reported by Massart (R. Massart, IEEE Trans. Magn. 1981, 17, 1247). Or a method using an oxidation reaction in an aqueous solution of a water-soluble iron salt.

磁性シリカ粒子(B)の体積平均粒子径は、好ましくは0.5〜20μm、更に好ましくは1〜10μm、特に好ましくは1〜5μmである。磁性シリカ粒子(B)の体積平均粒子径が0.5μm以上の場合、分離回収を速やかにできる傾向にあり、20μm以下であると、比表面積が大きくなり、固定化する物質(G)の結合量が低く結合効率が低下する傾向にある。   The volume average particle diameter of the magnetic silica particles (B) is preferably 0.5 to 20 μm, more preferably 1 to 10 μm, and particularly preferably 1 to 5 μm. When the volume average particle diameter of the magnetic silica particles (B) is 0.5 μm or more, there is a tendency that the separation and recovery can be performed quickly. When the volume average particle diameter is 20 μm or less, the specific surface area increases and the substance (G) to be immobilized is bound. The amount is low and the coupling efficiency tends to decrease.

本発明における磁性シリカ粒子(B)の体積平均粒子径は、任意の200個の磁性シリカ粒子(B)について走査型電子顕微鏡(日本電子株式会社製「JSM−7000F」)で観察して測定された粒子径の平均値である。   The volume average particle diameter of the magnetic silica particles (B) in the present invention is measured by observing an arbitrary 200 magnetic silica particles (B) with a scanning electron microscope (“JSM-7000F” manufactured by JEOL Ltd.). The average particle size.

本発明における磁性シリカ粒子(B)の製造方法は特に限定されないが、例えば特許文献2に記載の磁性金属酸化物粒子(A)を含有する(アルキル)アルコキシシランの水中油型エマルションを作製して縮合反応を行うことにより合成することができる。   The method for producing the magnetic silica particles (B) in the present invention is not particularly limited. For example, an oil-in-water emulsion of (alkyl) alkoxysilane containing the magnetic metal oxide particles (A) described in Patent Document 2 is prepared. It can synthesize | combine by performing a condensation reaction.

本発明における磁性シリカ粒子(C)は、粒子表面に固定化された物質(G)を介して分離対象物質(D)と結合させ、磁石を用いて磁気分離することにより、試料(E)中から目的物質(D1)を精製することができる。   In the sample (E), the magnetic silica particles (C) in the present invention are bonded to the separation target substance (D) via the substance (G) immobilized on the particle surface and magnetically separated using a magnet. The target substance (D1) can be purified from

分離対象物質(D)が目的物質(D1)である場合、例えば以下に説明する工程で目的物質(D1)を得ることができる。まず、目的物質(D1)を含む試料(E1)中に磁性シリカ粒子(C)を分散させ攪拌し、磁性シリカ粒子(C)と目的物質(D1)との複合体(F1)を形成させる。次に、例えば反応槽の外側から磁石等により磁気分離し複合体(F1)を集め、目的物質(D1)が除かれた試料(E11)を排出し、リン酸緩衝液等の洗浄液を添加する。その後、磁石を取り除き、複合体(F1)を分散させて洗浄する。この操作は、1〜10回繰り返してもよい。次に、複合体(F1)を、磁性シリカ粒子(C)と目的物質(D1)との結合を阻害する物質を含む液に分散させ攪拌し、目的物質(D1)を磁性シリカ粒子(C)から乖離させる。その後、磁気分離により磁性シリカ粒子(C)を除去して、目的物質(D1)を含む試料を得ることができる。磁性シリカ粒子(C)から目的物質(D1)を乖離させる物質としては、目的物質(D1)と目的物質(D1)と結合する物質(G)の種類により異なるが、例えばドデシルベンゼンスルホン酸塩等の界面活性剤や食塩等が挙げられる。なお、目的物質(D1)を乖離した磁性シリカ粒子(C)は、再び目的物質(D1)と結合することが可能であり、再利用することができる。   When the separation target substance (D) is the target substance (D1), for example, the target substance (D1) can be obtained by the steps described below. First, the magnetic silica particles (C) are dispersed in the sample (E1) containing the target substance (D1) and stirred to form a composite (F1) of the magnetic silica particles (C) and the target substance (D1). Next, for example, the composite (F1) is collected by magnetic separation from the outside of the reaction vessel with a magnet or the like, the sample (E11) from which the target substance (D1) has been removed is discharged, and a washing solution such as a phosphate buffer is added. . Thereafter, the magnet is removed, and the composite (F1) is dispersed and washed. This operation may be repeated 1 to 10 times. Next, the composite (F1) is dispersed and stirred in a liquid containing a substance that inhibits the binding between the magnetic silica particles (C) and the target substance (D1), and the target substance (D1) is dispersed into the magnetic silica particles (C). Deviate from. Thereafter, the magnetic silica particles (C) are removed by magnetic separation to obtain a sample containing the target substance (D1). The substance that separates the target substance (D1) from the magnetic silica particles (C) varies depending on the type of the target substance (D1) and the substance (G) that binds to the target substance (D1). For example, dodecylbenzenesulfonate, etc. Surfactants, salt, and the like. Note that the magnetic silica particles (C) separated from the target substance (D1) can be bound to the target substance (D1) again and can be reused.

分離対象物質(D)が除去対象物質(D2)である場合、例えば以下に説明する工程で目的物質(D1)を得ることができる。まず、目的物質(D1)と除去対象物質(D2)を含む試料(E2)中に磁性シリカ粒子(C)を分散させ攪拌し、磁性シリカ粒子(C)と除去対象物質(D2)との複合体(F2)を形成させる。
次に、例えば反応槽の外側から磁石等により、試料(E2)から除去対象物質(D2)が除去され目的物質(D1)を含む上澄み液の試料(E21)から複合体(F2)を磁気分離して、試料(E2)から除去対象物質(D2)が除去された目的物質(D1)を含む試料(E21)を得ることができる。上記操作は複数回行うことができ、回数が多いほど目的物質(D1)の純度を高めることができる。複合体(F2)を除去対象物質(D2)と磁性シリカ粒子(C)との結合を乖離させる物質を含む液に分散させ攪拌し、磁性シリカ粒子(C)から除去対象物質(D2)を乖離させ、磁性シリカ粒子(C)を磁気分離して上澄み液を廃棄することで、磁性シリカ粒子(C)を回収することができる。回収した磁性シリカ粒子(C)は再び除去対象物質(D2)と結合することができ、再利用することが可能である。
When the separation target substance (D) is the removal target substance (D2), for example, the target substance (D1) can be obtained by the steps described below. First, the magnetic silica particles (C) are dispersed in the sample (E2) containing the target substance (D1) and the removal target substance (D2) and stirred to obtain a composite of the magnetic silica particles (C) and the removal target substance (D2). A body (F2) is formed.
Next, the substance (D2) to be removed is removed from the sample (E2) with a magnet or the like from the outside of the reaction vessel, and the complex (F2) is magnetically separated from the supernatant sample (E21) containing the target substance (D1). Thus, the sample (E21) containing the target substance (D1) from which the removal target substance (D2) has been removed from the sample (E2) can be obtained. The above operation can be performed a plurality of times, and as the number of times increases, the purity of the target substance (D1) can be increased. The composite (F2) is dispersed in a liquid containing a substance that dissociates the bond between the substance to be removed (D2) and the magnetic silica particles (C) and stirred to separate the substance to be removed (D2) from the magnetic silica particles (C). The magnetic silica particles (C) can be recovered by magnetically separating the magnetic silica particles (C) and discarding the supernatant. The recovered magnetic silica particles (C) can be combined with the substance to be removed (D2) again and can be reused.

以下、実施例により本発明を更に説明するが、本発明はこれらに限定されるものではない。以下、特に定めない限り、%は重量%、部は重量部を示す。   EXAMPLES Hereinafter, although an Example demonstrates this invention further, this invention is not limited to these. Hereinafter, unless otherwise specified, “%” represents “% by weight” and “parts” represents “parts by weight”.

製造例1
磁性金属酸化物粒子(A−1)の作製:
反応容器に塩化鉄(III)6水和物186部、塩化鉄(II)4水和物68部及び水1288部を仕込んで溶解させて50℃に昇温し、撹拌下温度を50〜55℃の保持しながら、25%アンモニア水280部を1時間かけて滴下し、水中にマグネタイト粒子を得た。得られたマグネタイト粒子に分散剤であるオレイン酸64部を加え、2時間撹拌を継続した。室温に冷却後、デカンテーションにより固液分離して得られたオレイン酸が吸着したマグネタイト粒子を水1000部で洗浄する操作を3回行い、さらにアセトン1000部で洗浄する操作を2回行い、40℃で2日間乾燥させることで、磁性金属酸化物粒子(A−1)を得た。磁性金属酸化物(A−1)の体積平均粒子径は10nmであった。
Production Example 1
Production of magnetic metal oxide particles (A-1):
In a reaction vessel, 186 parts of iron (III) chloride hexahydrate, 68 parts of iron (II) chloride tetrahydrate and 1288 parts of water are charged and dissolved, and the temperature is raised to 50 ° C. While maintaining the temperature, 280 parts of 25% ammonia water was added dropwise over 1 hour to obtain magnetite particles in water. 64 parts of oleic acid as a dispersant was added to the obtained magnetite particles, and stirring was continued for 2 hours. After cooling to room temperature, magnetite particles adsorbed with oleic acid obtained by solid-liquid separation by decantation were washed 3 times with 1000 parts of water, and further washed twice with 1000 parts of acetone. Magnetic metal oxide particles (A-1) were obtained by drying at 2 ° C. for 2 days. The volume average particle diameter of the magnetic metal oxide (A-1) was 10 nm.

磁性シリカ粒子(B−1)の作製:
磁性金属酸化物粒子(A−1)75部をテトラエトキシシラン240部に加えて分散し、分散液(B1)を調製した。次に、反応容器に水5050部、25%アンモニア水溶液3500部、NSA−17(三洋化成工業株式会社製)400部を加えてクリアミックス(エムテクニック社製)を用いて混合し溶液(B2)を得た。50℃に昇温後、クリアミックスを回転数6,000rpmで攪拌しながら、上記分散液(B1)を溶液(B2)に1時間かけて滴下後、50℃で1時間反応させた。反応後、2,000rpmで20分間遠心分離して微粒子の存在する上清を除いた。次に、得られた固相に水5000部を加えて粒子を分散させて600rpmで10分間遠心分離後、微粒子の存在する上清を除く操作を20回行い、続いて得られた固相に水5000部を加えて粒子を分散させて300rpmで10分間遠心分離することにより、大きな粒子径の粒子を沈降させて除去することで分級を行った。さらに、水50部を加えて粒子を分散させた後、磁石を用いて粒子を集磁し上清を除く操作を10回行い、磁性シリカ粒子(B−1)を得た。磁性シリカ粒子(B−1)の体積平均粒子径は2μmであった。磁性シリカ粒子(B−1)の磁性金属酸化物粒子(A−1)の含有量は75重量%であった。
Production of magnetic silica particles (B-1):
75 parts of magnetic metal oxide particles (A-1) were added and dispersed in 240 parts of tetraethoxysilane to prepare a dispersion (B1). Next, 5050 parts of water, 3500 parts of 25% aqueous ammonia solution and 400 parts of NSA-17 (manufactured by Sanyo Chemical Industries) are added to the reaction vessel and mixed using a clear mix (manufactured by MTechnic Co., Ltd.). Solution (B2) Got. After raising the temperature to 50 ° C., the dispersion (B1) was added dropwise to the solution (B2) over 1 hour while stirring the clear mix at a rotation speed of 6,000 rpm, and then reacted at 50 ° C. for 1 hour. After the reaction, the mixture was centrifuged at 2,000 rpm for 20 minutes to remove the supernatant containing fine particles. Next, 5000 parts of water was added to the obtained solid phase to disperse the particles, and after centrifugation at 600 rpm for 10 minutes, the operation of removing the supernatant containing fine particles was performed 20 times. Classification was performed by adding 5000 parts of water to disperse the particles and centrifuging at 300 rpm for 10 minutes to settle and remove particles having a large particle size. Furthermore, 50 parts of water was added to disperse the particles, and then the operation of collecting the particles using a magnet and removing the supernatant was performed 10 times to obtain magnetic silica particles (B-1). The volume average particle diameter of the magnetic silica particles (B-1) was 2 μm. The content of the magnetic metal oxide particles (A-1) in the magnetic silica particles (B-1) was 75% by weight.

磁性シリカ粒子(C−1)の作製
1重量%γ−アミノプロピルトリエトキシシラン含有水溶液400mLの入った蓋付きポリエチレン瓶に分級後の磁性シリカ粒子(B−1)100mgを加え、25℃で1時間反応させ、磁石で粒子を集磁後、液をアスピレーターで吸引除去した。次いで脱イオン水400mLを加えて磁性シリカ粒子を分散させ、磁石で粒子を集磁後、液をアスピレーターで吸引除去して磁性シリカ粒子を洗浄した。この洗浄操作を4回行った。次いで、この洗浄後の磁性シリカ粒子を0.5重量%無水コハク酸含有エタノール溶液100mLの入った蓋付きポリエチレン瓶に加え、25℃で2時間反応させた。そして、磁石で粒子を集磁後、液をアスピレーターで吸引除去して磁性シリカ粒子を洗浄した。この洗浄操作を3回行った。次に、塩酸N,N−ジメチルアミノエチルクロリド(和光純薬工業)の0.05gを脱イオン水の3mLに20〜40℃で溶解した後、磁性シリカ粒子に加え、その溶液を室温(25℃)で攪拌しながら、水酸化ナトリウム(和光純薬工業)の0.1gを溶解した脱イオン水1.5mLを1分間かけて一定速度で滴下し仕込んだ。室温(25℃)で1時間攪拌したのち、磁石で磁性粒子を集磁し、液体部分をピペットで取り出した。その後、5mLの脱イオン水を洗浄液として加え、25℃で10分間静置した後、磁石で磁性粒子を集磁し、液体部分をピペットで取り除いた。この脱イオン水で洗浄する操作をさらに2回繰り返し、3級アミンである官能基(J−1)を含有する物質(G−1)が固定化された磁性シリカ粒子(C−1)を得た。また、官能基(J−1)の含有量は、1mmol/gであった。
Preparation of Magnetic Silica Particles (C-1) 100 mg of the classified magnetic silica particles (B-1) was added to a polyethylene bottle with a lid containing 400 mL of an aqueous solution containing 1% by weight γ-aminopropyltriethoxysilane, and 1 at 25 ° C. After reacting for a time and collecting the particles with a magnet, the liquid was sucked and removed with an aspirator. Next, 400 mL of deionized water was added to disperse the magnetic silica particles. After collecting the particles with a magnet, the liquid was sucked and removed with an aspirator to wash the magnetic silica particles. This washing operation was performed 4 times. Next, the washed magnetic silica particles were added to a polyethylene bottle with a lid containing 100 mL of an ethanol solution containing 0.5% by weight of succinic anhydride, and reacted at 25 ° C. for 2 hours. Then, after collecting the particles with a magnet, the liquid was sucked and removed with an aspirator to wash the magnetic silica particles. This washing operation was performed three times. Next, 0.05 g of hydrochloric acid N, N-dimethylaminoethyl chloride (Wako Pure Chemical Industries, Ltd.) was dissolved in 3 mL of deionized water at 20 to 40 ° C. and then added to the magnetic silica particles, and the solution was added to room temperature (25 C.), 1.5 mL of deionized water in which 0.1 g of sodium hydroxide (Wako Pure Chemical Industries) was dissolved was added dropwise at a constant rate over 1 minute. After stirring at room temperature (25 ° C.) for 1 hour, magnetic particles were collected with a magnet, and the liquid portion was taken out with a pipette. Thereafter, 5 mL of deionized water was added as a washing solution, and the mixture was allowed to stand at 25 ° C. for 10 minutes. Then, magnetic particles were collected with a magnet, and the liquid portion was removed with a pipette. This operation of washing with deionized water is further repeated twice to obtain magnetic silica particles (C-1) on which a substance (G-1) containing a functional group (J-1) which is a tertiary amine is immobilized. It was. Moreover, content of the functional group (J-1) was 1 mmol / g.

製造例2
磁性シリカ粒子(B)の作製において、磁性金属酸化物粒子(A)を110部用いた以外は製造例1と同様に行い、磁性シリカ粒子(B−2)を得た。磁性シリカ粒子(B−2)の体積平均粒子径は2μmであった。磁性シリカ粒子(B−2)の磁性金属酸化物粒子(A)の含有率は94%であった。磁性シリカ粒子(C)の作製において、磁性シリカ粒子(B−1)の変わりに磁性シリカ粒子(B−2)を用いた以外は製造例1と同様に行い、官能基(J−1)を含有する物質(G−1)が固定化された磁性粒子(C−2)を得た。また、官能基(J−1)の含有量は、1mmol/gであった。
Production Example 2
The production of the magnetic silica particles (B) was performed in the same manner as in Production Example 1 except that 110 parts of the magnetic metal oxide particles (A) were used to obtain magnetic silica particles (B-2). The volume average particle diameter of the magnetic silica particles (B-2) was 2 μm. The content of the magnetic metal oxide particles (A) in the magnetic silica particles (B-2) was 94%. The production of the magnetic silica particles (C) was performed in the same manner as in Production Example 1 except that the magnetic silica particles (B-2) were used instead of the magnetic silica particles (B-1), and the functional group (J-1) was changed. Magnetic particles (C-2) having the contained substance (G-1) immobilized thereon were obtained. Moreover, content of the functional group (J-1) was 1 mmol / g.

製造例3
磁性シリカ粒子(B)の作製において、磁性金属酸化物粒子(A)を60部用いた以外は製造例1と同様に行い、磁性シリカ粒子(B−3)を得た。磁性シリカ粒子(B−3)の体積平均粒子径は2μmであった。磁性シリカ粒子(B−3)の磁性金属酸化物粒子(A)の含有率は60%であった。磁性シリカ粒子(C)の作製において、磁性シリカ粒子(B−1)の変わりに磁性シリカ粒子(B−3)を用いた以外は製造例1と同様に行い、官能基(J−1)を含有する物質(G−1)が固定化された磁性粒子(C−3)を得た。また、官能基(J−1)の含有量は、1mmol/gであった。
Production Example 3
The production of the magnetic silica particles (B) was performed in the same manner as in Production Example 1 except that 60 parts of the magnetic metal oxide particles (A) were used to obtain magnetic silica particles (B-3). The volume average particle diameter of the magnetic silica particles (B-3) was 2 μm. The content of the magnetic metal oxide particles (A) in the magnetic silica particles (B-3) was 60%. Production of the magnetic silica particles (C) was carried out in the same manner as in Production Example 1 except that the magnetic silica particles (B-3) were used instead of the magnetic silica particles (B-1), and the functional group (J-1) was added. Magnetic particles (C-3) having the contained substance (G-1) immobilized thereon were obtained. Moreover, content of the functional group (J-1) was 1 mmol / g.

比較製造例1
磁性シリカ粒子(B)の作製において、磁性金属酸化物粒子(A)を45部用いた以外は製造例1と同様に行い、磁性シリカ粒子(B−4’)を得た。磁性シリカ粒子(B−4’)の体積平均粒子径は2μmであった。磁性シリカ粒子(B−4’)の磁性金属酸化物粒子(A)の含有率は50%であった。磁性シリカ粒子(C)の作製において、磁性シリカ粒子(B−1)の変わりに磁性シリカ粒子(B−4’)を用いた以外は製造例1と同様に行い、官能基(J−1)を含有する物質(G−1)が固定化された磁性粒子(C−1’)を得た。また、官能基(J−1)の含有量は、1mmol/gであった。
Comparative production example 1
The production of the magnetic silica particles (B) was performed in the same manner as in Production Example 1 except that 45 parts of the magnetic metal oxide particles (A) were used to obtain magnetic silica particles (B-4 ′). The volume average particle diameter of the magnetic silica particles (B-4 ′) was 2 μm. The content of the magnetic metal oxide particles (A) in the magnetic silica particles (B-4 ′) was 50%. The production of the magnetic silica particles (C) was performed in the same manner as in Production Example 1 except that the magnetic silica particles (B-4 ′) were used instead of the magnetic silica particles (B-1), and the functional group (J-1) The magnetic particle (C-1 ′) in which the substance (G-1) containing γ was immobilized was obtained. Moreover, content of the functional group (J-1) was 1 mmol / g.

製造例4
塩酸N,N−ジメチルアミノエチルクロリド(和光純薬工業)の代わりに2−ジエチルアミノエチルクロリド塩酸塩(和光純薬工業)を用いた以外は、製造例1と同様にして行い、3級アミンである官能基(J−2)を含有する物質(G−2)が固定化された磁性シリカ粒子(C−4)を得た。また、官能基(J−2)の含有量は、1mmol/gであった。
Production Example 4
Performed in the same manner as in Production Example 1 except that 2-diethylaminoethyl chloride hydrochloride (Wako Pure Chemical Industries) was used instead of hydrochloric acid N, N-dimethylaminoethyl chloride (Wako Pure Chemical Industries). Magnetic silica particles (C-4) having a substance (G-2) containing a certain functional group (J-2) immobilized thereon were obtained. Moreover, content of the functional group (J-2) was 1 mmol / g.

比較製造例2
磁性シリカ粒子(C)の作製において、塩酸N,N−ジメチルアミノエチルクロリド(和光純薬工業)の代わりに2−ジエチルアミノエチルクロリド塩酸塩(和光純薬工業)を用いた以外は、比較製造例1と同様にして行い、官能基(J−2)を含有する物質(G−2)が固定化された磁性粒子(C−2’)を得た。また、官能基(J−2)の含有量は、1mmol/gであった。
Comparative production example 2
Comparative production example except that 2-diethylaminoethyl chloride hydrochloride (Wako Pure Chemical Industries) was used instead of hydrochloric acid N, N-dimethylaminoethyl chloride (Wako Pure Chemical Industries) in the production of magnetic silica particles (C). The magnetic particles (C-2 ′) having the substance (G-2) containing the functional group (J-2) immobilized thereon were obtained in the same manner as in Example 1. Moreover, content of the functional group (J-2) was 1 mmol / g.

製造例5
1重量%γ−アミノプロピルトリエトキシシラン含有水溶液40mLの入った蓋付きポリエチレン瓶に分級後の磁性シリカ粒子(B−1)50mgを加え、25℃で1時間反応させ、磁石で粒子を集磁後、液をアスピレーターで吸引除去した。次いで脱イオン水40mLを加えて磁性シリカ粒子を分散させ、磁石で粒子を集磁後、液をアスピレーターで吸引除去して磁性シリカ粒子を洗浄した。この洗浄操作を4回行った。次いで、この洗浄後の磁性シリカ粒子を0.5重量%無水コハク酸含有エタノール溶液10mLの入った蓋付きポリエチレン瓶に加え、25℃で2時間反応させた。そして、磁石で粒子を集磁後、液をアスピレーターで吸引除去して磁性シリカ粒子を洗浄した。この洗浄操作を3回行った。次いで、この洗浄後の磁性シリカ粒子を0.5重量%塩酸1−エチル−3−(3−ジメチルアミノプロピル)カルボジイミド(EDC)および0.5重量%N−ヒドロキシコハク酸イミド(NHS)含有水溶液40mLの入った蓋付きポリエチレン瓶に加え、25℃で1時間反応させた。そして、磁石で粒子を集磁後、液をアスピレーターで吸引除去して磁性シリカ粒子を洗浄した。この洗浄操作を3回行った。更にこの洗浄後の磁性シリカ粒子を、抗AFPポリクローナル抗体(ダコ・サイトメーション(株)社より購入)を20μg/mLの濃度で含む100mMモルホリノエタンスルホン酸緩衝液(pH5.0)40mLの入った蓋付きポリエチレン瓶に加え、25℃で3時間反応させた。反応後、磁石で粒子を集磁し、液をアスピレーターで吸引除去して磁性シリカ粒子を洗浄した。この洗浄操作を3回行い、物質(G−3)が固定化された磁性シリカ粒子(C−5)を得た。これを0.1%の牛血清アルブミン含有の0.02Mリン酸緩衝液(pH7.2)5mLに浸漬し4℃で保存した。
Production Example 5
50 mg of magnetic silica particles (B-1) after classification are added to a polyethylene bottle with a lid containing 40 mL of an aqueous solution containing 1% by weight γ-aminopropyltriethoxysilane, reacted at 25 ° C. for 1 hour, and the particles are collected by a magnet. Thereafter, the liquid was removed by suction with an aspirator. Next, 40 mL of deionized water was added to disperse the magnetic silica particles. After collecting the particles with a magnet, the liquid was sucked and removed with an aspirator to wash the magnetic silica particles. This washing operation was performed 4 times. Next, the washed magnetic silica particles were added to a polyethylene bottle with a lid containing 10 mL of an ethanol solution containing 0.5% by weight of succinic anhydride, and reacted at 25 ° C. for 2 hours. Then, after collecting the particles with a magnet, the liquid was sucked and removed with an aspirator to wash the magnetic silica particles. This washing operation was performed three times. Next, the magnetic silica particles after washing were washed with an aqueous solution containing 0.5 wt% 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide (EDC) and 0.5 wt% N-hydroxysuccinimide (NHS). It added to the polyethylene bottle with a lid | cover containing 40 mL, and made it react at 25 degreeC for 1 hour. Then, after collecting the particles with a magnet, the liquid was sucked and removed with an aspirator to wash the magnetic silica particles. This washing operation was performed three times. Furthermore, the magnetic silica particles after washing were charged with 40 mL of 100 mM morpholinoethane sulfonate buffer (pH 5.0) containing an anti-AFP polyclonal antibody (purchased from Dako Cytation Co., Ltd.) at a concentration of 20 μg / mL. The mixture was added to a polyethylene bottle with a lid and reacted at 25 ° C. for 3 hours. After the reaction, the particles were collected with a magnet, and the liquid was sucked and removed with an aspirator to wash the magnetic silica particles. This washing operation was performed three times to obtain magnetic silica particles (C-5) on which the substance (G-3) was immobilized. This was immersed in 5 mL of 0.02 M phosphate buffer (pH 7.2) containing 0.1% bovine serum albumin and stored at 4 ° C.

比較製造例3
磁性シリカ粒子(B−1)の代わりに磁性シリカ粒子(B−4’)を用いた以外は製造例5と同様に行い、物質(G−3)が固定化された磁性シリカ粒子(C−3’)を得た。これを0.1%の牛血清アルブミン含有の0.02Mリン酸緩衝液(pH7.2)5mLに浸漬し4℃で保存した。
Comparative production example 3
Magnetic silica particles (C-) having the substance (G-3) immobilized thereon were prepared in the same manner as in Production Example 5 except that magnetic silica particles (B-4 ′) were used instead of the magnetic silica particles (B-1). 3 ′) was obtained. This was immersed in 5 mL of 0.02 M phosphate buffer (pH 7.2) containing 0.1% bovine serum albumin and stored at 4 ° C.

磁性金属酸化物粒子(A)の体積平均粒子径、磁性シリカ粒子(B)の平均粒子径、磁性シリカ粒子(B)中の磁性金属酸化物(A)の含有率を以下の方法で測定し、結果を表1に示す。 The volume average particle diameter of the magnetic metal oxide particles (A), the average particle diameter of the magnetic silica particles (B), and the content of the magnetic metal oxide (A) in the magnetic silica particles (B) are measured by the following methods. The results are shown in Table 1.

<磁性金属酸化物粒子(A)の体積平均粒子径の測定方法>
走査型電子顕微鏡(型番JSM−7000F、メーカー名日本電子株式会社)を用いて、任意の200個の磁性金属酸化物[実施例において、水中のマグネタイト粒子をデカンテーションにより固液分離し、水で洗浄後、乾燥して得られたもの。]を観察して粒子径を測定し、体積平均粒子径を求めた。
<Method for measuring volume average particle diameter of magnetic metal oxide particles (A)>
Using a scanning electron microscope (model number JSM-7000F, manufacturer name JEOL Ltd.), any 200 magnetic metal oxides [in the examples, solid-liquid separation of magnetite particles in water by decantation and What was obtained after washing and drying. ] Was measured and the particle diameter was measured to determine the volume average particle diameter.

<磁性シリカ粒子(B)の平均粒子径の測定方法>
走査型電子顕微鏡(型番JSM−7000F、メーカー名日本電子株式会社)を用いて、任意の200個の磁性シリカ粒子(C)を観察して粒子径を測定し、体積平均粒子径を求めた。
<Measuring method of average particle diameter of magnetic silica particles (B)>
Using a scanning electron microscope (model number JSM-7000F, manufacturer name JEOL Ltd.), arbitrary 200 magnetic silica particles (C) were observed to measure the particle diameter, and the volume average particle diameter was determined.

<磁性シリカ粒子(B)中の磁性金属酸化物(A)の含有率の測定方法>
任意の20個のコア層(P)について、上記走査型電子顕微鏡で観察し、エネルギー分散型X線分光装置(型番INCA Wave/Energy、メーカー名オックスフォード社)により磁性金属酸化物(A)の含有量を測定してその平均値を含有量Xとした。また、同測定にてシリカの含有量を測定しその平均値を含有量Yとした。以下の計算式にて、磁性金属酸化物(A)の含有率を求めた。
磁性金属酸化物(A)の含有率(%)=(X)/(X+Y)
<Method for Measuring Content of Magnetic Metal Oxide (A) in Magnetic Silica Particles (B)>
Arbitrary 20 core layers (P) are observed with the above-mentioned scanning electron microscope, and contain magnetic metal oxide (A) with an energy dispersive X-ray spectrometer (model number INCA Wave / Energy, manufacturer: Oxford) The amount was measured and the average value was defined as the content X. Further, the content of silica was measured by the same measurement, and the average value was defined as content Y. The content of the magnetic metal oxide (A) was determined by the following calculation formula.
Content (%) of magnetic metal oxide (A) = (X) / (X + Y)

以下の実施例にて、試料(E)中の分離対象物質(D)を分離する方法を説明する。なお、集磁の時間は表1に記載の時間で行った。 In the following examples, a method for separating the separation target substance (D) in the sample (E) will be described. The time for collecting the magnets was the time shown in Table 1.

実施例1
磁性シリカ粒子(C−1)の0.1gに、塩化ナトリウムを0.85%で含有する0.1M,pH6.0のリン酸緩衝液の1990μLを加えた後、ウサギにNSE抗原を免疫して作製した、抗NSE抗体(D1−1)とNSE抗体以外の物質(D2−1)を含むNSE抗血清(E2−1、株式会社ティー・ケー・クラフト)10μLを加え、その溶液を室温(25℃)で1分間攪拌し、磁性シリカ粒子(C−1)と抗NSE抗体(D1−1)以外の物質(D2−1)との複合体(F2−1)を形成させた。磁石で複合体(F2−1)を集磁し、上澄み液をピペットで取り出し、抗NSE抗体(D1−1)を含む溶液(N−1)を得た。
Example 1
After adding 1990 μL of 0.1 M pH 6.0 phosphate buffer containing 0.85% sodium chloride to 0.1 g of magnetic silica particles (C-1), the rabbit was immunized with the NSE antigen. 10 μL of NSE antiserum (E2-1, TEK Kraft Co., Ltd.) containing anti-NSE antibody (D1-1) and a substance other than NSE antibody (D2-1) prepared in this manner was added, and the solution was added at room temperature ( The mixture was stirred at 25 ° C. for 1 minute to form a complex (F2-1) of magnetic silica particles (C-1) and a substance (D2-1) other than the anti-NSE antibody (D1-1). The complex (F2-1) was collected with a magnet, and the supernatant was taken out with a pipette to obtain a solution (N-1) containing an anti-NSE antibody (D1-1).

実施例2
磁性シリカ粒子(C−1)の代わりに磁性シリカ粒子(C−2)を用いた以外は実施例1と同様に行い、抗NSE抗体(D1−1)を含む溶液(N−2)を得た。
Example 2
A solution (N-2) containing the anti-NSE antibody (D1-1) was obtained in the same manner as in Example 1 except that the magnetic silica particles (C-2) were used instead of the magnetic silica particles (C-1). It was.

実施例3
磁性シリカ粒子(C−1)の代わりに磁性シリカ粒子(C−3)を用いた以外は実施例1と同様に行い、抗NSE抗体(D1−1)を含む溶液(N−3)を得た。
Example 3
A solution (N-3) containing the anti-NSE antibody (D1-1) was obtained in the same manner as in Example 1 except that the magnetic silica particles (C-3) were used instead of the magnetic silica particles (C-1). It was.

比較例1
磁性シリカ粒子(C−1)の代わりに磁性粒子(C−1’)を用いた以外は実施例1と同様に行い、抗NSE抗体溶液(N−1’)を得た。
Comparative Example 1
An anti-NSE antibody solution (N-1 ′) was obtained in the same manner as in Example 1 except that the magnetic particles (C-1 ′) were used instead of the magnetic silica particles (C-1).

実施例4
磁性シリカ粒子(C−1)の代わりに磁性シリカ粒子(C−4)を用いた以外は実施例1と同様に行い、抗NSE抗体(D1−1)を含む溶液(N−4)を得た。
Example 4
A solution (N-4) containing the anti-NSE antibody (D1-1) was obtained in the same manner as in Example 1 except that the magnetic silica particles (C-4) were used instead of the magnetic silica particles (C-1). It was.

比較例2
磁性シリカ粒子(C−4)の代わりに磁性粒子(C−2’)を用いた以外は実施例4と同様に行い、抗NSE抗体溶液(N−2’)を得た。
Comparative Example 2
An anti-NSE antibody solution (N-2 ′) was obtained in the same manner as in Example 4 except that the magnetic particles (C-2 ′) were used in place of the magnetic silica particles (C-4).

実施例5
製造例5で作製した磁性シリカ粒子(C−5)を含む分散液5mLの上澄み液を磁石で集磁して除去した。目的物質としてAFP(D1−2)を256ng/mL含むヒト血清液(E1−1)5mLを、上澄み液を除去した磁性シリカ粒子C−3に加え転倒攪拌を1時間行い、磁性シリカ粒子(C−3)とAFP(D1−2)との複合体(F1−1)を形成させた。反応後、試験管の外側から磁石で複合体(F1−1)を集め上澄み液を除去した。0.1重量%サンノニックSS−120(三洋化成工業株式会社製)を含む生理食塩水5mLを加えて粒子を分散させて集磁後、上澄み液を除く洗浄操作を3回行った。次に、0.5%ドデシルベンゼンスルホン酸ナトリウム水溶液5mLを加えて1時間転倒攪拌し、磁性シリカ粒子(C−5)からAFP(D1−2)を乖離させた。磁石で磁性シリカ粒子(C−5)を集磁し、上澄み液をピペットで取り出し、AFP(D1−2)を含む溶液(N−5)を得た。
Example 5
The supernatant of 5 mL of the dispersion liquid containing magnetic silica particles (C-5) prepared in Production Example 5 was collected by a magnet and removed. 5 mL of human serum (E1-1) containing 256 ng / mL of AFP (D1-2) as a target substance is added to the magnetic silica particles C-3 from which the supernatant has been removed, and the mixture is subjected to inversion stirring for 1 hour to obtain magnetic silica particles (C -3) and AFP (D1-2) complex (F1-1) was formed. After the reaction, the complex (F1-1) was collected with a magnet from the outside of the test tube, and the supernatant was removed. 5 mL of physiological saline containing 0.1% by weight Sannonic SS-120 (manufactured by Sanyo Chemical Industries, Ltd.) was added to disperse the particles, and after magnetic collection, the washing operation except the supernatant was performed three times. Next, 5 mL of a 0.5% sodium dodecylbenzenesulfonate aqueous solution was added, and the mixture was stirred by overturning for 1 hour to separate AFP (D1-2) from the magnetic silica particles (C-5). Magnetic silica particles (C-5) were collected with a magnet, and the supernatant was removed with a pipette to obtain a solution (N-5) containing AFP (D1-2).

比較例3
磁性シリカ粒子(C−5)の代わりに磁性粒子(C−3’)を用いた以外は実施例5と同様に行い、AFP(D1−2)を含む溶液(N−3’)を得た。
Comparative Example 3
Except having used magnetic particle (C-3 ') instead of magnetic silica particle (C-5), it carried out similarly to Example 5 and obtained the solution (N-3') containing AFP (D1-2). .

抗NSE抗体溶液の評価:
抗NSE抗体溶液(N−1、N−2、N−3、N−4、N−1’、N−2’)を検体希釈液セット(三洋化成工業)で千倍希釈した100μLと、スフィアライトNSEキャリブレーターセット(三洋化成工業)のNSE(90ng/mL)の100μLとを混合して、検体(M−1、M−2、M−3、M−4、M−1’、M−2’)を作製した。この検体のNSE濃度(ng/mL)を、スフィアライトNSE(三洋化成工業)および自動化学発光酵素免疫分析装置「SphereLight Wako」を用いて測定した。その結果を表1に示す。抗NSE抗体濃度が高いほど検体中のNSEが抗NSE抗体に吸収されるため、NSE濃度は低い値を示す。表1の結果より、実施例1〜4の抗NSE抗体溶液は、比較例1〜2の抗NSE抗体溶液に比べて、より短い集磁時間でNSE濃度が低い値を示しており、抗NSE抗体の濃度が高いことが判る。
Evaluation of anti-NSE antibody solution:
100 μL of an anti-NSE antibody solution (N-1, N-2, N-3, N-4, N-1 ′, N-2 ′) diluted 1000-fold with a sample diluent set (Sanyo Chemical Industries), and a sphere Samples (M-1, M-2, M-3, M-4, M-1 ′, M-2) were mixed with 100 μL of NSE (90 ng / mL) from a light NSE calibrator set (Sanyo Chemical Industries). ') Was made. The NSE concentration (ng / mL) of this specimen was measured using Spherelite NSE (Sanyo Chemical Industries) and an automated chemiluminescent enzyme immunoassay device “SphereLight Wako”. The results are shown in Table 1. The higher the anti-NSE antibody concentration is, the more NSE in the sample is absorbed by the anti-NSE antibody, and thus the lower the NSE concentration. From the results in Table 1, the anti-NSE antibody solutions of Examples 1 to 4 showed a lower value of NSE concentration in a shorter magnetic collection time than the anti-NSE antibody solutions of Comparative Examples 1 and 2, and anti-NSE It can be seen that the antibody concentration is high.

AFP溶液の評価:
AFP溶液(N−5、N−3’)のAFP濃度(ng/mL)を、スフィアライトAFP(三洋化成工業)および自動化学発光酵素免疫分析装置「SphereLight Wako」を用いて測定した。その結果を表1に示す。表1の結果より、実施例5は比較例3と比べて、より短い集磁時間でAFPを高濃度に精製できることが判る。
Evaluation of AFP solution:
The AFP concentration (ng / mL) of the AFP solution (N-5, N-3 ′) was measured using Spherelite AFP (Sanyo Kasei Kogyo Co., Ltd.) and an automated chemiluminescent enzyme immunoassay device “SphereLight Wako”. The results are shown in Table 1. From the results in Table 1, it can be seen that Example 5 can purify AFP to a high concentration in a shorter magnetic collection time than Comparative Example 3.

本発明の磁性シリカ粒子を用いた生物由来物質の分離方法は、抗体及び抗原の精製、タンパク質の精製、RNA及びDNAの精製、細菌及びウイルスの除去等に幅広く適用できる。   The method for separating a biological substance using the magnetic silica particles of the present invention can be widely applied to antibody and antigen purification, protein purification, RNA and DNA purification, bacteria and virus removal, and the like.

Claims (16)

磁性金属酸化物粒子(A)とシリカ(L)とを含有する磁性シリカ粒子であって、該磁性金属酸化物粒子(A)の含有量が該磁性金属酸化物粒子(A)と該シリカ(L)の合計重量に対して60〜95重量%である磁性シリカ粒子(B)の表面に、分離対象物質(D)と結合する物質(G)が固定化された磁性シリカ粒子(C)を用いて、試料(E)中の分離対象物質(D)を分離する物質の分離方法。 Magnetic silica particles containing magnetic metal oxide particles (A) and silica (L), the content of the magnetic metal oxide particles (A) being the magnetic metal oxide particles (A) and the silica ( The magnetic silica particles (C) in which the substance (G) that binds to the separation target substance (D) is immobilized on the surface of the magnetic silica particles (B) that is 60 to 95% by weight with respect to the total weight of L) A method for separating a substance that is used to separate a substance to be separated (D) in a sample (E). 磁性金属酸化物粒子(A)の体積平均粒子径が1〜50nmである、請求項1に記載の分離方法。 The separation method according to claim 1, wherein the magnetic metal oxide particles (A) have a volume average particle diameter of 1 to 50 nm. 前記磁性シリカ粒子(B)の体積平均粒子径が0.5〜20μmである、請求項1または2に記載の分離方法。 The separation method according to claim 1 or 2, wherein the magnetic silica particles (B) have a volume average particle diameter of 0.5 to 20 µm. 前記磁性金属酸化物粒子(A)に含有される金属酸化物が酸化鉄である請求項1〜3のいずれか1項に記載の分離方法。 The separation method according to any one of claims 1 to 3, wherein the metal oxide contained in the magnetic metal oxide particles (A) is iron oxide. 分離対象物質(D)が目的物質(D1)であって、目的物質(D1)を含む試料(E1)と磁性シリカ粒子(C)とを接触させて、磁性シリカ粒子(C)と目的物質(D1)との複合体(F1)を形成させた後、磁石で該複合体(F1)を試料(E1)から分離し、さらに該複合体(F1)から目的物質(D1)を乖離させて目的物質(D1)を得る工程を含む、請求項1〜4のいずれか1項に記載の分離方法。 The separation target substance (D) is the target substance (D1), and the sample (E1) containing the target substance (D1) is brought into contact with the magnetic silica particles (C), so that the magnetic silica particles (C) and the target substance ( After forming a complex (F1) with D1), the complex (F1) is separated from the sample (E1) with a magnet, and the target substance (D1) is further separated from the complex (F1). The separation method according to any one of claims 1 to 4, comprising a step of obtaining a substance (D1). 複合体(F1)から目的物質(D1)を乖離させることにより回収された磁性シリカ粒子(C)を、再び試料(E1)と磁性シリカ粒子(C)との接触に用いる工程を含む請求項5に記載の分離方法。 6. The method of using the magnetic silica particles (C) recovered by separating the target substance (D1) from the composite (F1) for contacting the sample (E1) and the magnetic silica particles (C) again. The separation method described in 1. 分離対象物質(D)が除去対象物質(D2)であって、目的物質(D1)と除去対象物質(D2)を含む試料(E2)と磁性シリカ粒子(C)とを接触させて、磁性シリカ粒子(C)と除去対象物質(D2)との複合体(F2)を形成させた後、磁石で該複合体(F2)を試料(E2)から分離することにより、除去対象物質(D2)が除去され目的物質(D1)を含む試料(E21)を得る工程を含む、請求項1〜4のいずれか1項に記載の分離方法。 The separation target substance (D) is the removal target substance (D2), and the sample (E2) containing the target substance (D1) and the removal target substance (D2) is brought into contact with the magnetic silica particles (C) to obtain magnetic silica. After the complex (F2) of the particles (C) and the removal target substance (D2) is formed, the complex (F2) is separated from the sample (E2) with a magnet, whereby the removal target substance (D2) is obtained. The separation method according to any one of claims 1 to 4, comprising a step of obtaining a sample (E21) that is removed and contains the target substance (D1). 除去対象物質(D2)の種類が複数である請求項7に記載の分離方法。 The separation method according to claim 7, wherein there are a plurality of types of substances to be removed (D2). 複合体(F2)から除去対象物質(D2)を乖離させることにより回収された磁性シリカ粒子(C)を、再び試料(E2)と磁性シリカ粒子(C)との接触に用いる工程を含む請求項7または8に記載の分離方法。 The method includes the step of using the magnetic silica particles (C) recovered by separating the substance to be removed (D2) from the composite (F2) for contacting the sample (E2) and the magnetic silica particles (C) again. The separation method according to 7 or 8. 分離対象物質(D)が、抗体、抗原、DNA、RNA、細胞、ウイルス、細菌、及びタンパク質のいずれかである請求項1〜9のいずれか1項に記載の分離方法。 The separation method according to any one of claims 1 to 9, wherein the substance to be separated (D) is any one of an antibody, an antigen, DNA, RNA, a cell, a virus, a bacterium, and a protein. 物質(G)がグルタルアルデヒド、アルブミン、カルボジイミド、ストレプトアビジン、ビオチン及び官能基を有するアルキルアルコキシシラン(H)からなる群から選ばれる少なくとも1種の有機化合物(K)を介して磁性シリカ粒子(C)に固定されている請求項1〜10のいずれか1項に記載の分離方法。 The substance (G) is magnetic silica particles (C) via at least one organic compound (K) selected from the group consisting of glutaraldehyde, albumin, carbodiimide, streptavidin, biotin and alkylalkoxysilane (H) having a functional group. The separation method according to any one of claims 1 to 10, wherein アルキルアルコキシシラン(H)が有する官能基が、アミノ基、カルボキシル基、水酸基、メルカプト基、グリシジルオキシ基及び炭素数が1〜18の炭化水素基からなる群から選ばれる少なくとも1種の官能基である、請求項11に記載の分離方法。 The functional group that the alkylalkoxysilane (H) has is at least one functional group selected from the group consisting of an amino group, a carboxyl group, a hydroxyl group, a mercapto group, a glycidyloxy group, and a hydrocarbon group having 1 to 18 carbon atoms. The separation method according to claim 11. 物質(G)が、分子量1000以下であり分離対象物質(D)と結合する官能基(J)を有する、請求項1〜12のいずれか1項に記載の分離方法。 The separation method according to any one of claims 1 to 12, wherein the substance (G) has a molecular weight of 1000 or less and has a functional group (J) that binds to the substance to be separated (D). 官能基(J)がアミノ基あるいはアンモニウム基である、請求項13に記載の分離方法。 The separation method according to claim 13, wherein the functional group (J) is an amino group or an ammonium group. 抗体、抗原、DNA、RNA、細胞、ウイルス、細菌、及びタンパク質からなる群より選ばれる少なくとも1種である分離対象物質(D)と結合する物質であって分子量1000以下であり分離対象物質(D)と結合する官能基(J)を有する物質(G)が、下記の磁性シリカ粒子(B)の表面に固定化された磁性シリカ粒子(C)。
磁性シリカ粒子(B):磁性金属酸化物粒子(A)とシリカ(L)とを含有する磁性シリカ粒子であって、該磁性金属酸化物粒子(A)の含有量が該磁性金属酸化物粒子(A)と該シリカ(L)の合計重量に対して60〜95重量%である磁性シリカ粒子(B)
A substance that binds to a substance to be separated (D) that is at least one selected from the group consisting of antibodies, antigens, DNA, RNA, cells, viruses, bacteria, and proteins, and has a molecular weight of 1000 or less and a substance to be separated (D Magnetic silica particles (C) in which a substance (G) having a functional group (J) that binds to) is immobilized on the surface of the following magnetic silica particles (B).
Magnetic silica particles (B): magnetic silica particles containing magnetic metal oxide particles (A) and silica (L), the content of the magnetic metal oxide particles (A) being the magnetic metal oxide particles Magnetic silica particles (B) that are 60 to 95% by weight based on the total weight of (A) and the silica (L)
官能基(J)がアミノ基あるいはアンモニウム基である、請求項15に記載の磁性シリカ粒子(C)。 The magnetic silica particle (C) according to claim 15, wherein the functional group (J) is an amino group or an ammonium group.
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