JPH0755795A - Test piece for analysis - Google Patents

Test piece for analysis

Info

Publication number
JPH0755795A
JPH0755795A JP22638193A JP22638193A JPH0755795A JP H0755795 A JPH0755795 A JP H0755795A JP 22638193 A JP22638193 A JP 22638193A JP 22638193 A JP22638193 A JP 22638193A JP H0755795 A JPH0755795 A JP H0755795A
Authority
JP
Japan
Prior art keywords
sample
test piece
fibrous structure
measurement
glucose
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP22638193A
Other languages
Japanese (ja)
Inventor
Satoshi Ibaraki
敏 茨木
Chiho Maeda
知穂 前田
Hiroshi Nakayama
博 中山
Hideo Yoshitome
英雄 吉留
Kiyoshi Takase
清 高瀬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kanebo Ltd
Original Assignee
Kanebo Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kanebo Ltd filed Critical Kanebo Ltd
Priority to JP22638193A priority Critical patent/JPH0755795A/en
Publication of JPH0755795A publication Critical patent/JPH0755795A/en
Pending legal-status Critical Current

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  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Abstract

PURPOSE:To obtain a test piece for analysis which can rapidly and accurately measure concentrations of various substances, in addition to body fluid such as blood, urea, etc., such as hydrogen peroxide, glucose, cholesterol, pyruvic acid, uric acid, etc., in solution such as wine, juice, etc., by a simple operation. CONSTITUTION:A thin platelike fibrous structure 1 containing reagent to be reacted with ingredient in a sample is so held between two water impermeable support plates 2 that one end of the structure 1 becomes a liquid sample suction port 3 by substantially aligning ends of the three members, and provided with a measuring opening 4 at one of the plate 2.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、血液や尿等の体液、ワ
イン,果汁中等の液体試料に含まれる各種成分、例え
ば、グルコース,コレステロール,尿酸,ピルビン酸,
過酸化水素等を簡便,迅速に検出し得る分析用試験片に
関する。
The present invention relates to various components contained in liquid samples such as body fluids such as blood and urine, wine and fruit juice, such as glucose, cholesterol, uric acid, pyruvic acid,
The present invention relates to an analytical test piece capable of detecting hydrogen peroxide and the like simply and quickly.

【0002】[0002]

【従来の技術】医療診断,環境計測,発酵モニター,品
質管理等に用いられる液体試料中の成分分析用試験片と
しては、pH試験紙のような液体、試料と接触すること
により、試験片中に保持された試薬が試料中の被分析成
分と反応し、その成分濃度に応じて変色するものがあ
る。被分析成分の定量は、この変色程度を肉眼でカラー
チャートと比較して行う方法や、試験片に光照射し照射
光の反射率変化より行う方法などがあり種々実用化され
ている。こうした試験片の多くは、試験片上に一定量の
試料を滴下し、試験片中の試薬と反応する成分の存在を
定量するものであり、滴下する液量が変動すると測定値
も変動してしまう。従って、現在実用化されている試験
片を用いる測定の際には、試料の滴下時に試料を定量計
量するピペット操作が必要であった。ピペット操作は、
医療機関,研究機関に従事するものにとっては問題のな
い操作であるが、これらに従事しない一般の人々にとっ
ては、馴染み難いものである。また、測定をルーチンで
行う人にとっては、測定の度毎に試験片以外にピペット
を常に準備し、これを操作せねばならず、煩雑であるた
め、より一層の測定迅速化,簡便化が望まれてきた。
2. Description of the Related Art Test pieces for analyzing components in liquid samples used for medical diagnosis, environmental measurement, fermentation monitoring, quality control, etc. In some cases, the reagent retained in the sample reacts with the component to be analyzed in the sample and changes color depending on the concentration of the component. The quantification of the component to be analyzed includes various methods such as a method of visually comparing the degree of discoloration with a color chart and a method of irradiating a test piece with light and changing the reflectance of irradiation light. Many of these test strips drop a fixed amount of sample on the test strip and quantify the presence of components that react with the reagents in the test strip, and the measured value also fluctuates if the amount of the dropped liquid changes. . Therefore, in the measurement using the test piece which is currently put into practical use, a pipette operation for quantitatively measuring the sample when dropping the sample was required. Pipetting
This is a problem-free operation for those engaged in medical institutions and research institutions, but it is difficult for ordinary people who are not involved in these operations to become familiar with it. In addition, for those who perform measurement routinely, a pipette other than the test piece must always be prepared and operated every time measurement is performed, which is complicated, and thus further speedup and simplification of measurement are desired. It has been rare.

【0003】分析,測定の素人が、ルーチン的に微量液
体試料を測定する典型的な例としては、糖尿病患者が行
う自己血糖測定がある。血液中のグルコース濃度を簡便
かつ迅速に知る事は、糖尿病の早期診断、並びに病態管
理に必要不可欠である。糖尿病患者は、その種類、重度
により個々の場合に応じて1日数回血中グルコース濃度
を測定し、そのパターンに基づいて、食事、運動及びイ
ンシュリン接種量を調整して糖尿病の治療に努める。こ
の場合、患者は測定値を、簡便、迅速かつ正確に知らね
ばならない。
A typical example of routine analysis and measurement of a small amount of liquid sample by an analytic / measuring technician is self-blood glucose measurement performed by a diabetic patient. It is indispensable to know the glucose concentration in blood simply and quickly for the early diagnosis of diabetes and the management of pathological conditions. The diabetic patient measures blood glucose concentration several times a day depending on the type and severity of the disease, and adjusts the diet, exercise, and insulin inoculation amount based on the pattern to try to treat diabetes. In this case, the patient must know the measured value simply, quickly and accurately.

【0004】現在広く行われている方法の一つには、先
ず採取したばかりの全血液の試料を糖酸化酵素、ペルオ
キシターゼを含有する酵素系含有試薬パッド上に置き、
血中グルコースとの反応により、過酸化水素を産生させ
る。試薬パッドには過酸化水素と反応する発色剤も含ま
れており、ペルオキシターゼの酵素反応により、血液中
のグルコース濃度に応じた強度で発色する。この場合、
試料は一定の時間試薬パッドと接触状態に置かれた後、
水流で洗い落とすか、拭き取る。その後、該面の発色を
反射率測定器で着色強度を読み取るか、カラーチャート
と比較して着色強度を読み取る方法がある。この方法は
長年グルコース濃度測定用に用いられてきており、ピペ
ッティング操作は除かれているが、患者は血液添加後決
められた時間後まで待機し、血液を流し去ったり、拭き
取ったりせねばならず、測定の簡便性という点に於いて
問題があった。一方、患者が、水流で洗い流す際あるい
は拭き取る際、その水洗条件、及び拭き取り圧により測
定値が影響を受ける事も避け難く、測定の正確性という
点に於いても問題があった。
One of the methods widely used at present is to place a sample of whole blood just collected on an enzyme system-containing reagent pad containing sugar oxidase and peroxidase.
Hydrogen peroxide is produced by reaction with blood glucose. The reagent pad also contains a color-developing agent that reacts with hydrogen peroxide, and develops color with an intensity corresponding to the glucose concentration in blood by the enzymatic reaction of peroxidase. in this case,
After the sample has been in contact with the reagent pad for a period of time,
Rinse with water or wipe off. After that, there is a method of reading the coloring intensity of the color of the surface with a reflectance measuring device or reading the coloring intensity by comparing with a color chart. This method has been used for glucose concentration measurements for many years and pipetting operations have been eliminated, but the patient must wait for a set time after blood addition to flush or wipe away blood. However, there was a problem in terms of ease of measurement. On the other hand, when the patient was washed with water or wiped off, it was unavoidable that the measurement values were affected by the washing conditions and the wiping pressure, and there was also a problem in terms of measurement accuracy.

【0005】このような問題を解決する方法として、臨
床検査室用途では、血液等の検体試料を試験紙片上に置
き、測定途上で検体を拭き取ったりすることなく、一定
時間後の発色強度を裏面(検体を滴下した面の反対側
面)より計測する、所謂ドライケミストリー技術が、当
***しょうや血清等の検体に適用するものとして開発さ
れ、更に、全血検体を適用できるものも種々提案されて
いる。例えば、ヘマトクリット値の変動の影響を抑制す
ると共に、発色量計測に血球色素が影響しないように、
検体を点着する最上層に光遮断物質を含む血球濾過層を
設ける方法(特開昭61ー96466号公報)、血球濾
過層部の目詰りや不完全な固液分離による定量性の低下
を、展開層の上に体積濾過層を密着設置することにより
解決しようとする方法(特開昭60ー230063号公
報)、或いは、多孔質展開層の上にメッシュ等から成る
展開促進層を設け、特に全血検体等の高粘性液体への適
用性能の向上を計る方法(特開平3ー148063号公
報)等が提案されている。
As a method for solving such a problem, in a clinical laboratory application, a specimen sample such as blood is placed on a test paper strip, and the coloring intensity after a certain period of time is removed without wiping the specimen during measurement. The so-called dry chemistry technology, which measures from the side opposite to the surface on which the sample was dropped, was originally developed to be applied to samples such as plasma and serum, and various types that can apply whole blood samples have also been proposed. There is. For example, while suppressing the effect of changes in hematocrit value, so that the blood cell pigment does not affect the measurement of color development,
A method of providing a blood cell filtration layer containing a light-blocking substance on the uppermost layer onto which a sample is spotted (Japanese Patent Laid-Open No. 61-96466), and a decrease in quantitativeness due to clogging of the blood cell filtration layer portion or incomplete solid-liquid separation A method in which a volume filtration layer is closely placed on the spreading layer (Japanese Patent Laid-Open No. 60-230063), or a development promoting layer made of a mesh or the like is provided on the porous spreading layer, In particular, a method (Japanese Patent Laid-Open No. 3-148063) for improving the application performance to a highly viscous liquid such as a whole blood sample has been proposed.

【0006】しかし、これらの方法はいずれも複雑な構
成を必要とするだけでなく、裏面での反射率測定を精度
よく行う目的から、光透過性の水不透明性支持板上に試
薬層等を積層した構造をとっているため、被分析成分を
酸化酵素を用いて測定する場合は、酵素反応に基質とし
て要求される酸素の裏面からの供給が妨害され、高濃度
域での定量性能が悪くなる場合があるといった問題があ
った。
However, all of these methods require not only a complicated structure but also a reagent layer or the like on a light-transmissive water-opaque support plate for the purpose of accurately measuring the reflectance on the back surface. Since it has a layered structure, when measuring analytes using oxidase, the supply of oxygen required as a substrate for the enzyme reaction from the back side is obstructed, and the quantitative performance in the high concentration range is poor. There was a problem that it might become.

【0007】また、特開昭63−101757号公報に
於いては、予め測定機器上に水平になるように装着した
試験紙に血液を点着した際の、裏面の大きな反射率変化
を検知することにより自動的に時間計測を開始し、経時
的に反射率を計測する方法が提案されており、この方法
に基づく機器が実用化されるに至っている。この方法に
よれば、操作に熟練度の低い患者であっても、試験紙を
測定器にセットした後、指先血を点着して、簡便に血糖
値の測定を行うことができる。
Further, in Japanese Patent Laid-Open No. 63-101757, a large change in reflectance on the back surface is detected when blood is spotted on a test paper which is previously mounted horizontally on a measuring instrument. Therefore, a method of automatically starting time measurement and measuring reflectance over time has been proposed, and a device based on this method has been put into practical use. According to this method, even a patient with a low degree of skill in operation can easily measure the blood glucose level by setting the test strip on the measuring instrument and then spotting fingertip blood.

【0008】一方、従来、糖尿病患者は、指先を穿刺し
て得た血液を測定に用いていたが、鈴木らは、上腕,腹
壁,大腿等から採った血液を用いて、測定を行う“無痛
性血糖測定を可能にする新システム”について提案して
いる(新薬と臨床 40(10)1991)。しかしな
がら、こうした上腕、腹壁、大腿等への穿刺により得ら
れる極微量の血液にも適用でき、簡単な操作で血糖値を
測定できる、反射率変化読み取り方式のグルコース検出
用試験片は、未だ提案されていないのが現状である。
On the other hand, conventionally, diabetic patients have used blood obtained by puncturing their fingertips for measurement, but Suzuki et al. Performed bloodless measurements on the upper arm, abdominal wall, thighs, etc. A new system that enables the measurement of sexual blood glucose ”has been proposed (New Drug and Clinical 40 (10) 1991). However, a test piece for glucose detection using a reflectance change reading method, which can be applied to an extremely small amount of blood obtained by puncturing such an upper arm, an abdominal wall, or a thigh, and can measure a blood glucose level by a simple operation, has not yet been proposed. The current situation is not.

【0009】[0009]

【発明が解決しようとする課題】そこで、本発明者ら
は、こうした現状に鑑み鋭意研究の結果、本発明に至っ
たもので、本発明の目的は、ピペット等の特別な用具を
用いて計量定量操作を行うこと無く、簡便、迅速、かつ
高精度に、試料中の被分析成分濃度を測定できる分析用
試験片を提供することにある。
Therefore, the present inventors have achieved the present invention as a result of earnest research in view of the present situation, and an object of the present invention is to measure using a special tool such as a pipette. An object of the present invention is to provide an analytical test piece capable of measuring the concentration of an analyte in a sample simply, quickly and highly accurately without performing a quantitative operation.

【0010】[0010]

【課題を解決するための手段】上述の目的は、液体試料
中の成分を分析するための試験片であって、試料中の成
分と反応する試薬を含有してなる薄片状の繊維質構造体
を、その繊維質構造体の一端が液体試料吸い込み口とな
るよう、2枚の水不浸透性支持板間に三者端部が略揃う
ようにして挾持し、更に、該支持板の一方に、測定用開
口部を有することを特徴とする分析用試験片により達成
される。
The above-mentioned object is a test piece for analyzing components in a liquid sample, which is a flaky fibrous structure containing a reagent that reacts with the components in the sample. So that one end of the fibrous structure serves as a liquid sample suction port so that the three end portions of the two water-impermeable support plates are substantially aligned with each other. And an analytical test piece having a measurement opening.

【0011】以下、本発明を詳述する。本発明の分析用
試験片の一実施態様例を図1に示すが、本発明はこの例
により何ら制限されるものではない。同図において、1
は被分析成分と反応する試薬を含有してなる繊維質構造
体、2は水不浸透性支持板、3は試料吸い込み口、4は
測定用開口部である。
The present invention will be described in detail below. One embodiment of the analytical test piece of the present invention is shown in FIG. 1, but the present invention is not limited to this example. In the figure, 1
Is a fibrous structure containing a reagent that reacts with the component to be analyzed, 2 is a water-impermeable support plate, 3 is a sample suction port, and 4 is a measurement opening.

【0012】図1に示す分析用試験片は、2枚の水不浸
透性支持板2で、薄片状の繊維質構造体1を挟持してお
り、その際、繊維質構造体1一端の厚み部分から液体試
料を吸い込むことができるように、繊維質構造体1端部
と水不浸透性支持板2端部とが略揃うようにし、試料吸
い込み口3を形成してなる。また、水不浸透性支持板2
の一方の繊維質構造体1上面に、検出用試薬類の反応過
程及びその着色状況を直接反射率変化等で計測するため
の測定用開口部4を設けてなる。
The analytical test piece shown in FIG. 1 has two thin water-impervious support plates 2 sandwiching a thin fibrous structure 1. At that time, one end of the fibrous structure 1 has a thickness. The sample suction port 3 is formed so that the end of the fibrous structure 1 and the end of the water-impermeable support plate 2 are substantially aligned so that the liquid sample can be sucked from the portion. In addition, the water-impermeable support plate 2
On the upper surface of one of the fibrous structures 1, there is provided a measurement opening 4 for directly measuring the reaction process of the detection reagents and the coloring state thereof by a reflectance change or the like.

【0013】上記液体試料吸い込み口3は、図1に示す
ように、繊維質構造体1一端の厚み部分またはその近傍
に設けると、試料吸い込みの際の操作が容易となるので
好適である。また、液体試料吸い込み口3に於いて、2
枚の支持板2の端部と繊維質構造体1の端部とは、完全
に一致しても良いし、一致していなくても良い。すなわ
ち、液体試料の粘度、使用可能な試料量、用いる繊維質
構造体の目付け密度の違い等により、液体試料の吸い込
み状況が異なるため、適宜、必要に応じて、支持板の端
部より繊維質構造体をわずかに突出させたり、引っ込め
たりすればよい。また、上下の支持板の端を完全に揃え
なくてもよい。また、試料吸い込み口3に対向する繊維
質構造体1の側端部は、開放されている方が吸い込み速
度がより早くなるので好ましい。このように、試験片に
吸い込み口3を設けることにより、従来の点着式の試験
片とは異なり、試料に試験片を接触させることによって
試料を吸収することができるので、腹部、上腕部等を穿
刺して得られる極少量の血液等の測定も可能となる。
As shown in FIG. 1, it is preferable that the liquid sample suction port 3 is provided in the thickness portion of one end of the fibrous structure 1 or in the vicinity thereof because the operation for sucking the sample is facilitated. At the liquid sample suction port 3, 2
The end portion of the support plate 2 and the end portion of the fibrous structure 1 may or may not be completely aligned. That is, since the suction condition of the liquid sample differs depending on the viscosity of the liquid sample, the usable sample amount, the difference in the areal density of the fibrous structure to be used, etc. The structure may be slightly projected or retracted. Further, the ends of the upper and lower support plates do not have to be completely aligned. Further, the side end of the fibrous structure 1 facing the sample suction port 3 is preferably opened because the suction speed becomes higher. As described above, by providing the suction port 3 in the test piece, unlike the conventional spotting type test piece, the sample can be absorbed by bringing the test piece into contact with the sample, so that the abdomen, upper arm, etc. It is also possible to measure an extremely small amount of blood or the like obtained by puncturing.

【0014】また、測定用開口部4の位置は、液体試料
吸い込み口3から試料を吸い込むときに、開口部4が直
接試料に触れないように、開口部4の端部が試料吸い込
み口3より0.5mm以上、好ましくは1mm以上離れ
ていることが好適である。なお、この距離をあまり長く
すると、吸い込んだ試料が開口部に達するまでに時間を
要したり、試料必要量が多くなったりするので、微量試
料、高粘度試料への適用性の点で、10mm以内にして
おくことが好ましい。また、測定用開口部4の形状は、
任意に構成すればよく、また、その大きさは、光計測時
の位置合わせの容易さ、光計測に於ける計測誤差の低減
により、形状を円形とした場合、直径3〜6mmが適当
である。また、本発明に於いては、開口部4の裏面は、
繊維質構造体1が支持体2により固定されているので、
液体試料の吸収により繊維質構造体1が変形することが
なく好適である。また、測定用開口部で繊維質構造体が
外気に接しているため、酸素の供給が良好に行え、被分
析成分の反応がスムーズに成される。
The position of the measurement opening 4 is such that the end of the opening 4 is located above the sample suction port 3 so that the opening 4 does not come into direct contact with the sample when sucking the sample from the liquid sample suction port 3. It is suitable that they are separated by 0.5 mm or more, preferably 1 mm or more. If this distance is set too long, it will take time for the sucked sample to reach the opening, and the required amount of sample will increase. It is preferable to keep it within the range. The shape of the measurement opening 4 is
It may be configured arbitrarily, and its size is preferably 3 to 6 mm in diameter when the shape is circular because of the ease of alignment during light measurement and the reduction of measurement error in light measurement. . Further, in the present invention, the back surface of the opening 4 is
Since the fibrous structure 1 is fixed by the support 2,
It is preferable that the fibrous structure 1 is not deformed by the absorption of the liquid sample. Further, since the fibrous structure is in contact with the outside air at the measurement opening, oxygen can be supplied well, and the reaction of the component to be analyzed can be smoothly performed.

【0015】本発明で用いる水不浸透性支持板2として
は、ポリエステル、ポリエチレン、ポリプロピレン、ナ
イロン、テフロン、ポリ塩化ビニル等が挙げられ、中で
も、強度、成形性等の点から、ポリエステル、ポリ塩化
ビニルが好ましい。また、水不浸透性支持板の厚さは、
試験片を構成した際の取扱いの容易さから80〜300
μmが好ましい。
Examples of the water-impermeable support plate 2 used in the present invention include polyester, polyethylene, polypropylene, nylon, Teflon, polyvinyl chloride and the like. Among them, from the viewpoint of strength, moldability, etc. Vinyl is preferred. In addition, the thickness of the water-impermeable support plate,
80 to 300 because of the ease of handling when the test piece is constructed
μm is preferred.

【0016】また、水不浸透性支持板2の形状は、図1
に示すような形状の他、長方形等としてもよいが、図1
に示すような形状とすると試料の吸い込みが容易となる
ので好適である。また、水不浸透性支持板は、繊維質構
造体より大きくし、試料吸い込み口及びその対向端部以
外は繊維質構造体を被覆するようにすることが試料吸収
量を一定とすることができ好適である。
The shape of the water-impermeable support plate 2 is shown in FIG.
In addition to the shape shown in FIG.
It is preferable that the shape shown in (3) is adopted because the sample can be easily sucked. Also, the water impermeable support plate should be larger than the fibrous structure, and the fibrous structure should be covered except for the sample inlet and its opposite end so that the sample absorption amount can be kept constant. It is suitable.

【0017】また、繊維質構造体1の大きさは、小さす
ぎると光反射率計測における測定誤差が大きくなった
り、取扱いが困難になるため、幅2〜6mm、長さ5〜
20mmの薄片状とすることが適当である。更に、繊維
質構造体1の厚さは、100〜400μが好ましく、厚
さバラツキのないものがよい。また、その形状は、板状
でも、円板状でもよい。
If the size of the fibrous structure 1 is too small, the measurement error in the light reflectance measurement becomes large and the handling becomes difficult. Therefore, the width is 2 to 6 mm and the length is 5 to 5.
It is suitable to have a flaky shape of 20 mm. Further, the thickness of the fibrous structure 1 is preferably 100 to 400 μ, and it is preferable that the thickness does not vary. Further, the shape thereof may be a plate shape or a disk shape.

【0018】上記繊維質構造体1としては、織物,編
物,不織布,ロ紙等が挙げられ、中でも、繊維質構造体
自体の均一性が良好で発色時の色斑が起こりにくい織編
物が高精度測定には適する。更に、編物を用いること
が、繊維質構造体を必要な大きさに裁断する際にほつれ
にくいこと、光を照射した際の反射光の均一性が高いこ
と、液体を吸い込んだ際に於ける液の拡散速度が、拡散
方向によらず一定なこと等により好ましい。編物組織に
ついては、トリコット編み、平編み、丸編み、平打ち等
が挙げられる。
Examples of the fibrous structure 1 include woven fabrics, knitted fabrics, non-woven fabrics, papers, and the like. Among them, woven and knitted fabrics having high uniformity of the fibrous structure itself and less likely to cause color spots during coloring are high. Suitable for precision measurement. Furthermore, the use of a knitted fabric makes it difficult to fray when cutting a fibrous structure into a required size, has high uniformity of reflected light when irradiated with light, and has a liquid content when sucking a liquid. It is preferable that the diffusion rate is constant regardless of the diffusion direction. Examples of the knit structure include tricot knitting, flat knitting, circular knitting, and flat knitting.

【0019】また、繊維質構造体を構成する繊維素材と
しては、毛,綿,麻,絹等の天然繊維、ナイロン6,ナ
イロン66等のポリアミド,ポリエチレンテレフタレー
ト、ポリブチレンテレフタレート,その共重合体等のポ
リエステル,アクリル,ビニロン,アセテート,レーヨ
ン等の合成繊維が挙げられる。これらは単独で、また
は、2種以上併用し複合繊維としたもの、また、混紡し
たものが用いられる。
The fibrous material constituting the fibrous structure includes natural fibers such as wool, cotton, linen, silk, polyamide such as nylon 6, nylon 66, polyethylene terephthalate, polybutylene terephthalate, copolymers thereof, and the like. Synthetic fibers such as polyester, acrylic, vinylon, acetate, and rayon can be used. These may be used alone or as a composite fiber by combining two or more kinds, or as a mixed fiber.

【0020】天然繊維に於いて、綿は短繊維であるため
毛羽が発生することがあり、絹等は細繊度であるが、湿
潤時の膨潤による平面性の低下が問題となる場合もあ
る。従って、製造の容易性、湿潤時に於ける繊維質構造
体の低膨潤性等による高精度測定の実現の点から、ポリ
エステル、ポリアミド糸等の合成繊維フィラメントが好
ましい。
Among the natural fibers, cotton is a short fiber and thus may have fluff, and silk and the like have a fineness, but there is a problem in that the flatness is deteriorated due to swelling when wet. Therefore, synthetic fiber filaments such as polyester and polyamide yarns are preferable from the viewpoint of easy production and realization of highly accurate measurement due to low swelling property of the fibrous structure when wet.

【0021】また、本発明に用いられる繊維の太さは、
単糸繊度5デニール以下の繊維を用いると、織物,編物
等を構成した際に繊維質構造体が400μ以下の厚さに
なり、光を照射した際に均一な反射光が得られ好適であ
る。更に、単糸繊度3デニール以下のものを用いると、
液体試料を吸い込む際の毛細管現象が生じやすく、かつ
構造体内の表面積を大きくし、保持し得る試薬量を多く
することができ、更に、試薬と被分析成分との接触場と
して広い面積を確保できるので好適である。
The thickness of the fiber used in the present invention is
When fibers having a single yarn fineness of 5 denier or less are used, the fibrous structure has a thickness of 400 μ or less when a woven fabric, a knitted fabric or the like is formed, and uniform reflected light can be obtained when irradiated with light, which is preferable. . Furthermore, if a single yarn fineness of 3 denier or less is used,
Capillary phenomenon tends to occur when sucking a liquid sample, the surface area inside the structure can be increased, and the amount of reagent that can be held can be increased, and a large area can be secured as a contact field between the reagent and the analyte. Therefore, it is preferable.

【0022】更に、単糸繊度1デニール以下の繊維は、
その表面積が、1デニールの異形断面糸(例えば偏平率
10の偏平糸)で6000cm2 /g、0.1デニール
の丸断面糸で9600cm2 /gと格段に広い表面積を
有する。このような広表面積繊維は、同一面積内に存在
する構成繊維本数を増やさずとも、繊維の総表面積を大
きくすることができる。このため、十分な毛細管現象を
得ることができると共に表面の平坦性を得ることができ
特に好ましい。更に、検出用試薬類を繊維質表面に多量
に吸着保持するためにも好適である。
Further, for fibers having a single yarn fineness of 1 denier or less,
Its surface area, have a significantly larger surface area and 9600cm 2 / g at 6000cm 2 /g,0.1 denier round cross-section yarn 1 denier modified cross-section yarn (e.g. flat yarn oblateness 10). Such a large surface area fiber can increase the total surface area of the fiber without increasing the number of constituent fibers existing in the same area. Therefore, it is particularly preferable because sufficient capillarity can be obtained and the flatness of the surface can be obtained. Further, it is also suitable for adsorbing and holding a large amount of the detection reagents on the fiber surface.

【0023】また、後述するように検出用試薬類として
グルコースオキシダーゼ,コレステロールオキシダーゼ
等の酸化酵素を用いる酸化反応には酸素が必要であり、
反応の場としては外気との接触面積を大きくとれること
が好ましいが、上記繊維質構造体は表面積を大きくとれ
るので、毛管現象により拡散して行く試料は、外気との
接触が良好に行える。このため、高濃度の被分析物存在
下でも、酸素供給不足による発色低下とバラツキが起こ
りにくく、測定レンジが広く確保できる。以上のことか
ら、単糸繊度1デニール以下の合成繊維が好適である。
Further, as will be described later, oxygen is required for the oxidation reaction using an oxidase such as glucose oxidase or cholesterol oxidase as a detection reagent,
Although it is preferable that a large contact area with the outside air can be taken as a reaction field, the surface area of the above fibrous structure can be large, so that the sample diffused by the capillary phenomenon can be brought into good contact with the outside air. Therefore, even in the presence of a high-concentration analyte, a decrease in color development and variation due to insufficient oxygen supply are less likely to occur, and a wide measurement range can be secured. From the above, synthetic fibers having a single yarn fineness of 1 denier or less are preferable.

【0024】また、単糸繊度1デニール以下の繊維は、
直接目的の細繊度糸を紡糸して得られたもの、物性の異
なる2種のポリマーよりなる複合繊維を溶解や分割等の
手段により細繊度化されたものが挙げられる。中でも、
製造容易性、後述の布帛密度、血液等の液体試料に対す
るポリマーの親和性、試料と接触した場合に於ける繊維
質構造体の低膨潤性等からみて、ポリアミド及びポリエ
ステルよりなる複合繊維を編物となした後フィブリル化
して得られたものが好ましい。
Fibers having a single yarn fineness of 1 denier or less are
Examples thereof include those obtained by directly spinning the desired fine fiber, and those obtained by finely arranging the composite fiber composed of two kinds of polymers having different physical properties by means such as dissolution or division. Above all,
From the viewpoint of ease of production, cloth density described later, affinity of polymer for liquid sample such as blood, low swelling property of fibrous structure when contacted with sample, etc., composite fiber composed of polyamide and polyester is used as knitted fabric. Those obtained by fibrillating after the treatment are preferable.

【0025】フィブリル化法としては、特公昭53−3
5633号公報等に記載された公知の方法等が用い得、
中でも、ベンジルアルコールを用いる方法が好ましい。
この工程の一例を示すと、ベンジルアルコールをパディ
ング法等で織編物に付与して複合繊維を開繊せしめ、次
に、水洗、乾燥、ヒートセットする方法が挙げられる。
かかる工程において、ベンジルアルコールによる処理温
度は20〜30℃が好ましい。また、必要に応じて、適
宜開繊工程に続き飽和水蒸気等による収縮工程を実施し
てもよい。
As a fibrillation method, Japanese Patent Publication No. 53-3
Known methods described in Japanese Patent No. 5633 can be used,
Among them, the method using benzyl alcohol is preferable.
An example of this step is a method in which benzyl alcohol is applied to the woven or knitted material by a padding method or the like to open the composite fiber, and then the composite fiber is washed with water, dried, and heat set.
In this step, the treatment temperature with benzyl alcohol is preferably 20 to 30 ° C. Further, if necessary, a shrinking step using saturated steam or the like may be appropriately performed following the opening step.

【0026】このフィブリル化型複合繊維としては、種
々のものが公知であり、本発明には、ポリアミド成分と
ポリエステル成分とが単一フィラメントの任意の横断面
において、一方の成分を他方の成分が完全に包囲するこ
となく両成分が接合された形状を有する複合繊維であ
り、具体的には、横断面がサイドバイサイド型の複合繊
維(図2(d))、サイドバイサイド繰り返し型の複合
繊維(図2(e))、放射型の形状を有する部分と該放
射部を補完する形状を有する他の成分からなる複合繊維
(図2(a),(b))、該形状に中空部を設けた繊維
(図2(c))等が好ましい。
Various fibrillated composite fibers are known, and according to the present invention, one component of the polyamide component and the polyester component is separated from the other component in any cross section of a single filament. A composite fiber having a shape in which both components are joined together without being completely surrounded, and specifically, a side-by-side type composite fiber (FIG. 2D) and a side-by-side repeating type composite fiber (FIG. 2). (E)), a composite fiber composed of a portion having a radial shape and another component having a shape that complements the radiation portion (FIGS. 2A and 2B), a fiber having a hollow portion in the shape (FIG. 2 (c)) and the like are preferable.

【0027】中でも、放射型の形状を有する部分と該放
射部を補完するくさび型の形状を有する他の成分からな
る複合繊維(図2(a),(b))が好ましく、放射型
の形状を有する部分としてポリアミド、くさび型の形状
を有する部分としてポリエステルを用い、このセグメン
トの繊度が0.2デニール以下のものが好ましい。
Among them, a composite fiber (FIGS. 2 (a) and 2 (b)) consisting of a portion having a radial shape and another component having a wedge shape that complements the radiation portion is preferable, and the radial shape is preferable. It is preferable that polyamide is used as the portion having a groove and polyester is used as the portion having a wedge shape, and the fineness of this segment is 0.2 denier or less.

【0028】また、上記繊維を編物とする場合、編目密
度は、コース(縦目)×ウエル(横目)の値が3000
から6000が好ましい。6000を超える場合、密度
が高すぎるため粘度の高い試料等は浸透速度が遅くなる
傾向にあり、逆に、3000未満の場合、試料によって
は測定範囲が狭くなったり、測定バラツキが大きくなっ
たりする傾向にある。また、コースとウエルはほぼ揃え
た方が、反射率の均一性に優れるため好ましい。
When the above fibers are knitted, the stitch density is 3000 (course (longitudinal) × well (horizontal)).
To 6000 are preferred. If it exceeds 6000, the sample having high viscosity tends to have a slow permeation rate because the density is too high. On the contrary, if it is less than 3000, the measurement range becomes narrow or the measurement variation becomes large depending on the sample. There is a tendency. Further, it is preferable that the course and the well are substantially aligned because the uniformity of reflectance is excellent.

【0029】上記繊維質構造体に含有させる試薬は、被
分析成分に応じて適宜使用すればよく、本発明に用いる
酸化酵素としては、グルコース測定時にはグルコースオ
キシダーゼ,コレステロース測定時にはコレステロール
オキシダーゼ,ピルビン酸測定時にはピルビン酸オキシ
ダーゼ,尿酸測定時にはウリカーゼ等の酵素が用いられ
る。また、本発明において、液体試料中の成分と反応し
て変色する検出用試薬類としては、蛍光、発光、吸光性
物質等を用いてもよいが、触媒として酵素を用いると、
測定感度を向上させることができ好適である。
The reagent contained in the fibrous structure may be appropriately used depending on the component to be analyzed. As the oxidase used in the present invention, glucose oxidase during glucose measurement, cholesterol oxidase and pyruvate during cholesterose measurement are used. An enzyme such as pyruvate oxidase is used for measurement, and an enzyme such as uricase is used for measurement of uric acid. Further, in the present invention, as the detection reagents that change color by reacting with the components in the liquid sample, fluorescence, luminescence, light-absorbing substances and the like may be used, but when an enzyme is used as a catalyst,
This is preferable because the measurement sensitivity can be improved.

【0030】例えば、グルコース測定時に用いるグルコ
ースオキシダーゼとしては、力価が100unit/m
g以上に精製されたものが望ましく、一試験片当たりこ
の乾燥粉末を少なくとも0.5μg存在させることが望
ましい。
For example, a glucose oxidase used for measuring glucose has a titer of 100 unit / m.
It is desirable that the powder is purified to a weight of at least g, and it is desirable that at least 0.5 μg of this dry powder be present per test piece.

【0031】本発明に於いて使用する被酸化性発色剤
は、ペルオキシダーゼの存在下、過酸化水素と反応して
血液、尿等の液体試料が示す吸収波長以外の波長で、特
徴的な吸収を示す化合物を用いるのがよい。この様な発
色剤としては、一成分系の場合、ο−トリジン、3,
3’,5,5’−テトラメチルベンジン、2,6−ジク
ロロフェノール、α−ナフトール、グアヤク脂等があ
る。また、顕色剤とカップラーとの組み合わせからなる
2成分系の指示薬を用いる場合は、顕色剤としては4−
アミノアンチピリン、3−メチル−2−ベンゾチアゾリ
ノンヒドラゾン、テトラメチルベンジジン等、カップラ
ーとしてはジメチルアニリン、ジエチルアニリン、N−
メチル−N−ヒドロキシエチルアニリン等のアニリン
類、フェノール、p−クロロフェノール、ピロガロール
等のフェノール類、1,7−ジヒドロキシナフタレン、
1−ナフトール−3,6−ジスルフォン酸等のナフトー
ル類を用いる。
The oxidizable color former used in the present invention reacts with hydrogen peroxide in the presence of peroxidase and exhibits a characteristic absorption at a wavelength other than the absorption wavelength exhibited by liquid samples such as blood and urine. Preference is given to using the compounds indicated. In the case of a one-component system, such color formers include o-tolidine, 3,
There are 3 ', 5,5'-tetramethylbenzine, 2,6-dichlorophenol, α-naphthol, guaiac fat and the like. When a two-component indicator consisting of a combination of a color developer and a coupler is used, the color developer should be 4-
Aminoantipyrine, 3-methyl-2-benzothiazolinone hydrazone, tetramethylbenzidine, etc. As couplers, dimethylaniline, diethylaniline, N-
Anilines such as methyl-N-hydroxyethylaniline, phenols such as phenol, p-chlorophenol and pyrogallol, 1,7-dihydroxynaphthalene,
Naphthols such as 1-naphthol-3,6-disulphonic acid are used.

【0032】繊維質構造体内に試料が浸透し、被酸化性
発色剤が発色する際及び発色した後に、発色剤が試料に
溶けて流れるようなクロマト現象が生じ測定精度を低下
させることがあるが、水難溶性の被酸化性発色剤を用い
ると、このような現象が生じにくく、極めて均一な発色
を示す。このような発色剤としては、例えば、2、7ー
ジアミノフルオレン、ο−トリジンの組み合わせ等があ
り、これは中性水溶液には難溶性であるが、メタノー
ル、エタノール等によく溶けるので、これらを溶媒とし
て用い繊維質構造体に含浸させればよい。水溶液難溶性
の発色剤を用いた際にクロマト現象が生じにくいのは、
試料が繊維質構造体中を拡散、浸透する速さより発色剤
の溶解する時間が遅いために試料の流動が停止した後
に、試薬が溶解するようなタイミングとなるためと考え
られる。
When the sample penetrates into the fibrous structure and the oxidizable color former develops color, and after the color develops, a chromatographic phenomenon may occur in which the color former melts and flows into the sample, which may lower the measurement accuracy. When a poorly water-soluble oxidizable color former is used, such a phenomenon hardly occurs, and extremely uniform color development is exhibited. Examples of such a color former include a combination of 2,7-diaminofluorene and o-tolidine, which are hardly soluble in a neutral aqueous solution, but are well soluble in methanol, ethanol, etc. It may be used as a solvent and impregnated into the fibrous structure. Chromatography is less likely to occur when using a coloring agent that is difficult to dissolve in an aqueous solution.
It is considered that the reagent dissolves after the flow of the sample is stopped because the time required for the color developing agent to dissolve is slower than the speed at which the sample diffuses and permeates in the fibrous structure.

【0033】繊維質構造体に保持する検出用試薬類に
は、酵素反応等に適したpH領域に試料液を制御すると
共に、酵素及び発色剤を安定に保持するため、pH緩衝
剤を加えておくことが好ましい。
To the detection reagents retained in the fibrous structure, a pH buffer is added in order to control the sample solution in a pH range suitable for enzyme reaction and the like and to stably retain the enzyme and the color former. It is preferable to set.

【0034】検出用試薬類にはその他、反射光測定に於
いて入射光の光反射剤として機能する光反射剤微粉末を
配合してもよい。光遮蔽剤微粉末としては、白色度が高
い方が好ましく、具体的には、酸化チタン、合成シリ
カ、炭酸マグネシウム、ケイ酸アルミニウム等が用いら
れ、特に、酸化チタンが好ましい。また、光遮蔽剤微粉
末は、発色ムラを起こすことがなく繊維質構造体内への
拡散を抑制できるよう粒径0.3〜1.0μmのものを
用いることが好ましい。
In addition to the detection reagents, fine powder of a light-reflecting agent that functions as a light-reflecting agent for incident light in the measurement of reflected light may be added. The light shielding agent fine powder preferably has a high whiteness, and specifically, titanium oxide, synthetic silica, magnesium carbonate, aluminum silicate, etc. are used, and titanium oxide is particularly preferable. Further, the light shielding agent fine powder preferably has a particle diameter of 0.3 to 1.0 μm so that diffusion into the fibrous structure can be suppressed without causing uneven coloring.

【0035】また、必要に応じて、例えば、非イオン性
界面活性剤、陰イオン性界面活性剤、陽イオン性界面活
性剤、両性イオン性界面活性剤等の界面活性剤を少量配
合してもよい。界面活性剤は、各試薬の分散に役立ち、
均一な試験片の形成を促し、水ぬれ性を向上させること
が出来る。界面活性剤は製造時の試薬含有溶液中0.0
1〜0.1重量%となるよう添加することが好ましい。
If necessary, a small amount of a surfactant such as a nonionic surfactant, anionic surfactant, cationic surfactant or zwitterionic surfactant may be added. Good. Surfactants help disperse each reagent,
It is possible to promote the formation of uniform test pieces and improve the wettability with water. The surfactant is 0.0 in the reagent-containing solution at the time of manufacture.
It is preferable to add 1 to 0.1% by weight.

【0036】上記繊維質構造体1と支持板2とは、繊維
質構造体1が支持板2間に単に挟み込まれて保持された
状態でも、両面粘着テープ等の粘着剤、接着剤等で両者
が密着している状態でも良い。なお、このとき、接着剤
成分が、繊維質構造体組織の内部まで拡散し、測定に影
響したり、試料の拡散を抑制したりすることがないよう
にする。
The fibrous structure 1 and the supporting plate 2 are bonded to each other with a pressure sensitive adhesive such as a double-sided adhesive tape or an adhesive even when the fibrous structure 1 is simply sandwiched between the supporting plates 2 and held. May be in close contact. At this time, the adhesive component is prevented from diffusing into the inside of the tissue of the fibrous structure, affecting the measurement, and suppressing the diffusion of the sample.

【0037】繊維質構造体が単に挟み込まれた場合、試
料の吸い込み速度は速くなるが、試料に試験片を接触す
る時間が試料吸い込み量に影響することがある。一方、
繊維質構造体が支持板と密着している場合は、最低必要
な試料への接触時間(試料吸い込み開始後試料が開口部
位まで展開し、更に、試験片内の微小空間が試料で満た
されるまでの時間)経過後、試験片を引き続き試料に接
触していても試料吸い上げ量が増加せずに測定値の変動
が生じないため高精度の測定に適する。また、繊維質構
造体が試料との接触により膨潤しやすいような場合に
は、繊維質構造体が支持板に密着している方が測定面の
平面性が崩れにくく好ましい結果を与える。また、繊維
質構造体は、支持板の開口部周辺部分に於いて支持板に
密着していることが好ましい。
When the fibrous structure is simply sandwiched, the suction speed of the sample increases, but the time of contacting the test piece with the sample may affect the suction amount of the sample. on the other hand,
If the fibrous structure is in close contact with the support plate, the minimum required contact time with the sample (after the sample suction starts, the sample develops to the open area, and further, the microspace in the test piece is filled with the sample. After the lapse of time), even if the test piece is continuously in contact with the sample, the sample suction amount does not increase and the measured value does not fluctuate, which is suitable for highly accurate measurement. Further, when the fibrous structure is likely to swell due to contact with the sample, it is preferable that the fibrous structure is in close contact with the support plate because the flatness of the measurement surface is less likely to collapse. Moreover, it is preferable that the fibrous structure is in close contact with the support plate in the peripheral portion of the opening of the support plate.

【0038】また、試料吸い込み口3周辺部は、図3
、に示すように繊維質構造体が支持板と密着してい
ても密着していなくても実用上差し支えはないが、血液
のように比較的粘度の高い試料を測定する際には、吸い
込み口周辺は密着していない方が試料の吸い込み開始が
スムーズである。これは両面粘着テープがスペーサーの
ような役目をし繊維質構造体と支持板間に生じた間隙に
試料が先ず毛細管現象で入るため、繊維質構造体と試料
の接触面積が増加し繊維質構造体内への試料の拡散がス
ムーズに生じるためと考えられる。
Further, the periphery of the sample suction port 3 is shown in FIG.
It does not matter in practice whether the fibrous structure is in close contact with the support plate or not, as shown in, but when measuring a sample with a relatively high viscosity such as blood, the suction port It is easier to start sucking the sample if the periphery is not in close contact. This is because the double-sided adhesive tape acts as a spacer and the sample first enters into the gap created between the fibrous structure and the support plate by a capillary phenomenon, so that the contact area between the fibrous structure and the sample increases and the fibrous structure It is considered that this is because the sample diffuses smoothly into the body.

【0039】本発明の分析用試験片を製造する際の一例
を示すと、まず、被分析成分に応じたオキシダーゼ、ペ
ルオキシダーゼ、光反射剤粉末、被酸化性指示薬、界面
活性剤等をpH5〜7程度の緩衝液に溶解または分散さ
せる。この中に適当な大きさの繊維質構造体を浸漬す
る。このとき、液が内部まで確実に入り込むようにする
ため減圧処理を施すことが好ましい。その後、繊維質構
造体を溶液中より取り出し乾燥後、所定の大きさに裁断
し、図1に示すように水不浸透性支持板に挟み込む。な
お、水不浸透性支持板は、その片面に両面接着テープを
貼り付けた後に適宜必要な大きさに裁断し、また、支持
板の一方には、測定用開口部を設けるようにすると、試
験片の製造を容易に行うことができる。
An example of producing the test piece for analysis of the present invention will be described. First, oxidase, peroxidase, light-reflecting agent powder, oxidizable indicator, surfactant, etc. depending on the components to be analyzed are added at pH 5 to 7. Dissolve or disperse in some buffer. A fibrous structure having an appropriate size is immersed in this. At this time, it is preferable to carry out a decompression process so that the liquid can surely enter the inside. Then, the fibrous structure is taken out of the solution, dried, cut into a predetermined size, and sandwiched between water-impermeable support plates as shown in FIG. In addition, the water-impermeable support plate is cut to a required size after attaching a double-sided adhesive tape on one side thereof, and one of the support plates is provided with a measurement opening, and the test is conducted. The pieces can be easily manufactured.

【0040】また、分析用試験片に検出用試薬類を含有
させる別の方法としては、上記のように、被分析成分に
応じた検出用試薬類をpH5〜7程度の緩衝液等の溶媒
に溶解または分散させた試薬溶液を準備し、図1に示す
ような構成の試験片を作製した後、この試験片を上記試
薬溶液に接触させて試験片に含浸させ、これを乾燥して
分析用試験片を得る方法がある。
As another method of incorporating the detection reagents into the analytical test strip, as described above, the detection reagents corresponding to the components to be analyzed are dissolved in a solvent such as a buffer solution having a pH of about 5 to 7. After preparing a dissolved or dispersed reagent solution and producing a test piece having a structure as shown in FIG. 1, the test piece is brought into contact with the reagent solution to impregnate the test piece, and the test piece is dried to be used for analysis. There is a method of obtaining a test piece.

【0041】このようにすると、乾燥時斑が生じにく
く、繊維質構造体に均一に検出用試薬類を保持させるこ
とができ好適である。また、試験片を容易かつ再現性良
く製造できるうえ、使用する試薬類の回収率を良好に製
造する事が可能である。被酸化性発色剤のうち水難溶性
で有機溶媒に溶解する物を用いる場合には、これを有機
溶媒に溶かしておき、この液に試験片を接触して被酸化
性発色剤を含浸させててもよい。
In this way, it is preferable that spots are less likely to occur when dried and the fibrous structure can hold the detection reagents uniformly. In addition, the test piece can be easily and reproducibly manufactured, and the recovery rate of the reagents to be used can be excellently manufactured. When using an oxidizable color developing agent that is sparingly soluble in water and soluble in an organic solvent, dissolve it in an organic solvent and contact a test piece with this solution to impregnate the oxidizable color developing agent. Good.

【0042】各試薬に試験片を接触し含浸させる方法と
しては、試験片の開口部、試料吸い込み口よりピペット
等を用いて一定量ずつ繊維質構造体に試薬液を供給する
方法や、試薬溶液に試験片の一部を接触させて毛細管現
象で繊維質構造体内に試薬を吸い込む様な方法がある。
試薬溶液に試験片の一部を接触させて毛細管現象で繊維
質構造体内に試薬を吸い込む場合は、本試験片の構造上
の特徴により吸い込まれる試薬量が2枚の支持板間と繊
維質構造体内部に形成される微小空間により規制される
ため、ピペット等を用いなくても試験片に含浸される試
薬量を常に一定にできるため、極めて容易な操作で再現
性良好に試験片を作製することができる。
As a method of contacting and impregnating each reagent with a test piece, a reagent solution is supplied to the fibrous structure from the opening of the test piece or a sample suction port by a fixed amount using a pipette or a reagent solution. There is a method in which a part of the test piece is brought into contact with and the reagent is sucked into the fibrous structure by a capillary phenomenon.
When a part of the test piece is brought into contact with the reagent solution and the reagent is sucked into the fibrous structure by the capillary phenomenon, the amount of the reagent sucked is between the two support plates and the fibrous structure due to the structural characteristics of the test piece. Since it is regulated by the minute space formed inside the body, the amount of reagent impregnated in the test piece can always be kept constant without using a pipette, etc., so that the test piece can be produced with excellent reproducibility by extremely easy operation. be able to.

【0043】図1に示すような試験片の構成に於いて、
5×15ミリの繊維質構造体を用いた場合、吸い込まれ
る試薬液量は5〜6μlであり、100枚の試験片を作
製する場合は700μl程度の含浸溶液を準備しておけ
ば充分であり試薬類を非常に有効に利用する事ができ試
薬の回収率は良好である。
In the structure of the test piece as shown in FIG.
When a 5 × 15 mm fibrous structure is used, the amount of the reagent liquid to be sucked is 5 to 6 μl, and when preparing 100 test pieces, it is sufficient to prepare an impregnating solution of about 700 μl. The reagents can be used very effectively and the recovery rate of the reagents is good.

【0044】次に、本発明の試験片を用いた測定の一例
について述べる。酸化酵素を用いる際に於ける測定の原
理は、被分析成分を対応する酸化酵素を触媒として酸化
した際に、被分析物量に応じて発生する過酸化水素によ
り、ペルオキシダーゼを触媒として被酸化性発色剤を酸
化するという、従来、ドライケミストリーの分野で一般
的に行われてきたものである。測定すべき液体試料に本
試験片の試料吸い込み口を接触させると、液体試料は、
繊維質構造体自体及び繊維質構造体と水不浸透性支持板
間に形成される隙間に毛細管現象により吸い込まれてい
く。この際、測定に供される液体試料は、腹部、上腕等
を専用の穿刺針等で穿刺して得られるような極微量の血
液でも、食品製造用タンク内の大量の果汁でも良い。
Next, an example of measurement using the test piece of the present invention will be described. The principle of measurement when using an oxidase is that when a component to be analyzed is oxidized using the corresponding oxidase as a catalyst, hydrogen peroxide generated according to the amount of the analyte causes the oxidative color development using peroxidase as a catalyst. Conventionally, oxidation of agents has been generally performed in the field of dry chemistry. When the sample inlet of the test piece is brought into contact with the liquid sample to be measured, the liquid sample becomes
The fibrous structure itself and the gaps formed between the fibrous structure and the water-impermeable support plate are sucked by the capillary phenomenon. At this time, the liquid sample used for the measurement may be an extremely small amount of blood obtained by puncturing the abdomen, upper arm or the like with a dedicated puncture needle or the like, or a large amount of fruit juice in the food manufacturing tank.

【0045】試料採取はそれら試料液に試験片の吸い込
み口を触れるだけで良く、試料の吸い込みに要する時間
は極めて短い。例えば、繊維質構造体を1デニール以下
のナイロンとポリエステルのフィラメントよりなる編物
とし、編物の厚さを200μm、幅5mmに裁断したも
のを用いて、光反射率計測用の開口部の端を吸い込み口
から2mmのところに設けた場合、この開口部位内の編
物(測光部)まで、試料が拡散してくるために必要な試
料量は、3〜5μlと極微量でよい。また、試料が開口
部位に完全に到達するまでに要する時間は、液体試料の
粘度,繊維質構造体の性質にもよるが、尿、血清等余り
粘度の高くないものを試料にした場合1秒以下であり、
液体試料の吸い込みが迅速に行われ、検出用試薬類とス
ムーズに接触させることができる。
Sampling can be performed simply by touching the suction port of the test piece with the sample liquid, and the time required for sucking the sample is extremely short. For example, the fibrous structure is a knit made of nylon and polyester filaments having a denier of 1 denier or less, and the knitted product is cut into a thickness of 200 μm and a width of 5 mm, and the end of the opening for measuring the light reflectance is sucked in. When the sample is provided 2 mm from the mouth, the sample amount necessary for the sample to diffuse up to the knitted fabric (photometric part) in the opening part may be an extremely small amount of 3 to 5 μl. The time required for the sample to reach the opening completely depends on the viscosity of the liquid sample and the properties of the fibrous structure, but if the sample is not so high in viscosity such as urine and serum, it takes 1 second. Is
The liquid sample can be sucked quickly and can be brought into contact with the detection reagents smoothly.

【0046】従って、試験片を液体試料に接触させるに
必要な最低時間は、使用する試料、試験片作製時の諸条
件により異なるが、通常、5秒以内でよく、尿、血清等
余り粘度の高くないものを試料にした場合には1秒程度
でよい。尚、試料に接触させる最低必要な時間以上長く
試験片を試料に接触させても、試験片内の微小空間(繊
維質構造体内部の繊維間隙及び支持板と繊維質構造体間
に形成される隙間)は試料液で満たされているため毛細
管現象による試料の吸い込みはそれ以上は実質上生じな
い。このことは試験片内に吸い込まれる試料量が形成さ
れる微小空間体積により規制されることを示しており、
試験片が試料を自動的に定量していることを示す。この
ため本試験片を用いる測定に於いては、試料を一定量得
るためのピペット操作等は不要になる。
Therefore, the minimum time required to bring the test piece into contact with the liquid sample varies depending on the sample used and various conditions at the time of preparing the test piece, but is usually 5 seconds or less, and urine, serum, and other residual viscosity may be sufficient. If a sample that is not expensive is used, it takes about 1 second. In addition, even if the test piece is contacted with the sample for a longer time than the minimum necessary time for contacting with the sample, a minute space in the test piece (fiber gap inside the fibrous structure and between the support plate and the fibrous structure is formed. Since the (gap) is filled with the sample liquid, the suction of the sample due to the capillary phenomenon does not substantially occur. This indicates that the amount of sample drawn into the test piece is regulated by the minute space volume formed,
It shows that the test piece is automatically quantifying the sample. Therefore, in the measurement using this test piece, pipetting or the like for obtaining a fixed amount of sample is not necessary.

【0047】また、従来のような試料点着タイプの試験
片を用いた場合には、大量の試料の点着により試験片の
裏側まで試料が漏れ、反射率読み取り装置を汚すと言っ
たトラブルを生じることがあったが、本発明のように吸
い込みタイプの試験片を用いると、このようなトラブル
は生じない。
Further, when a conventional sample spotting type test piece is used, there is a problem that a large amount of sample is spotted and the sample leaks to the back side of the test piece and stains the reflectance reading device. However, such trouble does not occur when a suction type test piece is used as in the present invention.

【0048】被分析成分濃度に応じて被酸化性発色剤は
発色するが、試料吸い上げ後、反射率読み取り装置に分
析片をセットし反射率読み取りを行い、被分析物濃度を
測定する。反射率計測は、試料吸い上げ後、発色強度が
変化している最中に反射率計測してその変化速度を求め
るレートアッセイでも、発色強度が一定値に達した後に
測定を行うエンドポイントアッセイでもよい。
Although the oxidizable color former develops color depending on the concentration of the component to be analyzed, after the sample is sucked up, the analytical piece is set in the reflectance reading device and the reflectance is read to measure the concentration of the analyte. The reflectance measurement may be either a rate assay in which the reflectance is measured after the sample has been drawn up and the rate of change is measured while the color intensity is changing, or an endpoint assay in which the measurement is performed after the color intensity reaches a certain value. .

【0049】反射率測定から求められたK/S値と、被
分析物濃度の関係より試料中の被分析物を定量すること
ができる。なお、K/S値は下記式(1)により定義さ
れ、本式は反射率分光分析法に関して導かれたクベルカ
−ムンクの式を簡略化したものである。 K/S=(1−Rt)2 /2Rt (1) (但し、Rtは、特定の時間tで測定された反射率であ
り、式(2)により定義される量である。 Rt=(rt−rb)/(ro−rb) (2) (但し、rbは試験片からの反射光がない場合の光強度
測定値、rtは時間tに於ける光強度測定値及びroは
試験片に白色板を置いた場合の光強度測定値であ
る。))
The analyte in the sample can be quantified from the relationship between the K / S value obtained from the reflectance measurement and the analyte concentration. The K / S value is defined by the following equation (1), and this equation is a simplified version of the Kubelka-Munk equation derived for reflectance spectroscopy. K / S = (1−Rt) 2 / 2Rt (1) (where Rt is the reflectance measured at a specific time t and is an amount defined by the equation (2). Rt = (rt -Rb) / (ro-rb) (2) (where, rb is the light intensity measurement value when there is no reflected light from the test piece, rt is the light intensity measurement value at time t, and ro is the white color on the test piece. It is the light intensity measurement value when the plate is placed.))

【0050】本発明に於いて作製した試験片を用い試料
中の被分析物濃度測定を行う際の反射率読み取り装置
は、例えば、図4に示されるがごとく、光源6(使用し
た被酸化性発色剤の吸収極大波長に対応する吸収極大波
長を有する発光ダイオード)、反射光検出器7、増幅器
8、A/D変換器9、マイクロプロセッサ10及び表示
装置11により構成されるものを用いる。試験片セット
時、装置上の試験片をセットする面と、試験片の支持板
の一面は、しっかりと接触し光源と光反射面の角度、距
離等が変動しないように構成されている。本装置は反射
光検出器上に試験片がセットされると反射光量を読み取
り、K/S値を算出し表示する。
The reflectance reading device for measuring the concentration of the analyte in the sample using the test piece manufactured in the present invention is, for example, as shown in FIG. A light emitting diode having an absorption maximum wavelength corresponding to the absorption maximum wavelength of the color former, a reflected light detector 7, an amplifier 8, an A / D converter 9, a microprocessor 10 and a display device 11 is used. When the test piece is set, the surface on which the test piece is set on the apparatus and one surface of the support plate of the test piece are firmly in contact with each other, and the angle and distance between the light source and the light reflection surface are not changed. When the test piece is set on the reflected light detector, this device reads the amount of reflected light, calculates the K / S value, and displays it.

【0051】[0051]

【発明の効果】以上のように、本発明の分析用試験片
は、水不浸透性支持板間に形成される繊維質構造体を含
む微小空間内に於いて、毛細管現象が生じやすいため、
液体試料の吸い込み、拡散が速やかであり、測定部位ま
で試料が容易に到達し、簡便、迅速かつ正確な、被分析
成分の広い濃度範囲にわたる測定が可能である。また、
試料が展開する際に外気との接触を良好にすることがで
きるため酸素の供給不足が生じにくく、正確な測定が可
能である。
As described above, the analytical test piece of the present invention is apt to cause a capillary phenomenon in the minute space containing the fibrous structure formed between the water-impermeable support plates.
The liquid sample is quickly sucked and diffused, and the sample easily reaches the measurement site, which enables simple, rapid, and accurate measurement of the analyte component over a wide concentration range. Also,
Since the contact with the outside air can be improved when the sample is developed, insufficient supply of oxygen is unlikely to occur, and accurate measurement is possible.

【0052】本試験片を用いる測定に於いては毛細管現
象により吸い込まれる試料量は試験片の構成により規制
されているので、試料吸い込み量を常に一定にすること
ができ、ピペット等を用いての定量計量操作は不要であ
る。本試験片は、糖尿病患者が自ら行う、血液中のグル
コース濃度測定に適用できる他、その他の医療診断、環
境計測、発酵モニター等に適用することが可能である。
また、本試験片を用いる測定に於いては水平に置かれた
測定器上の試験片に液体試料を点着する必要がないの
で、上腕、大腿、腹壁等身体の各部位から得られるよう
な微量の血液試料を用いて測定することも可能である。
In the measurement using this test piece, the amount of the sample sucked by the capillary phenomenon is regulated by the structure of the test piece, so that the sample sucked amount can always be made constant and it is possible to use a pipette or the like. No quantitative weighing operation is required. This test piece can be applied to the measurement of glucose concentration in blood performed by a diabetic patient by himself / herself, and can also be applied to other medical diagnosis, environmental measurement, fermentation monitor and the like.
In addition, in the measurement using this test piece, it is not necessary to spot the liquid sample on the test piece placed on the horizontally placed measuring instrument, so that it can be obtained from each part of the body such as the upper arm, thigh, abdominal wall, etc. It is also possible to measure using a minute amount of blood sample.

【0053】[0053]

【実施例】以下、本発明を実施例により説明するが、本
発明はこれらの実施例に限定されるものではない。
EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

【0054】実施例1 表1に記載した10種類の素材を繊維質構造体として用
い、以下のようにしてグルコース濃度測定用試験片を作
製し、水溶液中のグルコース濃度測定を行った。
Example 1 Using the ten kinds of materials shown in Table 1 as the fibrous structure, a glucose concentration measuring test piece was prepared as follows, and the glucose concentration in the aqueous solution was measured.

【0055】グルコース濃度測定用試験片の製造方法 表1に記載の繊維質構造体(5×5cm)を、表2に記
載した被酸化性発色剤含有液5mlにそれぞれ浸した
後、引き上げ、30℃で、1時間乾燥した。更に、表2
に記載した酵素類含有液に浸した後、繊維質構造体を引
き上げ、30℃で、3時間乾燥した。これを5×15m
mに裁断し、試薬類含有繊維質構造体とした。水不浸透
性支持体としては厚さ100μmのポリエステルシート
を用いた。このシートに両面粘着テープを貼り、図5
、に示す2種の形状に裁断した。この2種の支持板
を前述の試薬類含有繊維質構造体を挟持するように貼り
合わせグルコース濃度測定用試験片とした(図5)。
Method for Producing Test Piece for Glucose Concentration Measurement Each of the fibrous structures (5 × 5 cm) shown in Table 1 was dipped in 5 ml of the liquid containing the oxidizable color former shown in Table 2 and then pulled up to 30 It was dried at ℃ for 1 hour. Furthermore, Table 2
After immersing in the enzyme-containing liquid described in 1., the fibrous structure was pulled up and dried at 30 ° C. for 3 hours. This is 5 × 15m
It was cut into m to obtain a reagent-containing fibrous structure. A 100 μm-thick polyester sheet was used as the water-impermeable support. Stick double-sided adhesive tape on this sheet, and
It was cut into two shapes shown in. The two types of support plates were attached to each other so as to sandwich the above-described reagent-containing fibrous structure to obtain a glucose concentration measurement test piece (FIG. 5).

【0056】[0056]

【表1】 [Table 1]

【0057】[0057]

【表2】 [Table 2]

【0058】被測定用グルコース溶液の調製 蒸留水に既知量のグルコースを添加し、各種濃度のグル
コース溶液を得た。試験片の反射率読み取り装置 本発明に於いて作製したグルコース濃度測定用試験片を
用い、試料中のグルコース濃度測定を行う際の分析装置
は前述の図4に示される装置を用いた。
Preparation of glucose solution for measurement A known amount of glucose was added to distilled water to obtain glucose solutions of various concentrations. Reflectance reading device for test piece The glucose concentration measuring test piece prepared in the present invention was used, and the analyzer shown in FIG. 4 was used as an analyzer for measuring glucose concentration in a sample.

【0059】上記で作製した試験片を用いて、グルコー
ス濃度を各種変化した際のグルコース水溶液の濃度測定
及び測定精度評価を行った。すなわち、試験片の試料吸
い込み口を1〜2秒グルコース試料溶液に接触した後、
速やかに反射率読み取り装置にセットし、試料吸い込み
開始後1分経過後のK/S値を測定結果として得た。
尚、反射率100%は標準白色板を用いて反射率測定の
度毎に設定した。
Using the test piece prepared above, the concentration of the glucose aqueous solution was measured and the measurement accuracy was evaluated when the glucose concentration was variously changed. That is, after contacting the sample inlet of the test piece with the glucose sample solution for 1 to 2 seconds,
The sample was immediately set on the reflectance reading device, and the K / S value 1 minute after the start of sucking the sample was obtained as the measurement result.
The reflectance of 100% was set for each reflectance measurement using a standard white plate.

【0060】各試験片を用いて測定を行った際のK/S
値、及びグルコース濃度250mg/dlの試料につい
て、それぞれの試験片10枚を用いて行った測定精度評
価結果を表3に示す。いずれの試験片に於いてもグルコ
ース濃度が高くなるにつれてK/S値の増加が認めら
れ、本発明の試験片がグルコース濃度測定に有効である
ことが示された。
K / S when measured using each test piece
Table 3 shows the measurement accuracy evaluation results obtained by using 10 test pieces for each of the values and the glucose concentration of 250 mg / dl. In each of the test pieces, an increase in the K / S value was observed as the glucose concentration increased, demonstrating that the test piece of the present invention is effective for measuring the glucose concentration.

【0061】[0061]

【表3】 [Table 3]

【0062】実施例2 表4に示す単糸繊度1デニール以下の細繊度合成繊維よ
り成る繊維質構造体を用いる以外は、実施例1と同様に
してグルコース濃度測定用試験片を作製し、更に、実施
例1と同様な方法によりグルコース水溶液の濃度測定を
行い、K/S値及び測定精度を求めた。
Example 2 A glucose concentration measuring test piece was prepared in the same manner as in Example 1 except that a fibrous structure composed of fine fineness synthetic fibers having a single yarn fineness of 1 denier or less shown in Table 4 was used. The glucose solution concentration was measured in the same manner as in Example 1 to determine the K / S value and measurement accuracy.

【0063】[0063]

【表4】 [Table 4]

【0064】結果を表5に示す。グルコース濃度上昇に
伴い、K/S値も上昇し良好な定量性が認められ、本発
明の試験片が高精度、かつ広範囲のグルコース濃度測定
に有効であることが示された。
The results are shown in Table 5. As the glucose concentration increased, the K / S value also increased, and good quantification was observed, showing that the test piece of the present invention is highly accurate and effective for measuring a wide range of glucose concentrations.

【0065】[0065]

【表5】 [Table 5]

【0066】実施例3 実施例2に於ける、単糸繊度0.08〜0.5デニー
ル、ナイロン/ポリエステルの複合繊維(鐘紡社製:ザ
ヴィーナMX)よりなる繊維質構造体を用いた試験片を
使用し、コレステロール測定用、過酸化水素測定用試験
片を作製し試料液中のコレステロールもしくは過酸化水
素の濃度測定を行い、K/S値を求めた。なお、酵素類
含有溶液は、表6に示す液を用いた。
Example 3 A test piece using a fibrous structure made of a composite fiber of nylon / polyester (Zavena MX manufactured by Kanebo Co., Ltd.) having a single yarn fineness of 0.08 to 0.5 denier in Example 2. Was used to prepare test pieces for measuring cholesterol and hydrogen peroxide, and the concentration of cholesterol or hydrogen peroxide in the sample solution was measured to determine the K / S value. As the enzyme-containing solution, the solutions shown in Table 6 were used.

【0067】[0067]

【表6】 [Table 6]

【0068】試料血液の調製 コレステロール測定用人血漿よりコレステロールを含む
リポタンパクを分取し、コレステロール濃度既知の濃厚
溶液を作製した。人血液の総コレステロール濃度を市販
の測定キット(富士ドライケム5500)により測定
し、この測定値に基づき、人血液に対し前述のコレステ
ロール濃厚溶液をコレステロール濃度がそれぞれ10
0、200、400mg/dlとなるよう添加し、試料
を調製した。過酸化水素測定用既知濃度の過酸化水素水
溶液を蒸留水で希釈して濃度が1、10、100mg/
dlの試料を調製した。
Preparation of Sample Blood Lipoprotein containing cholesterol was fractionated from human plasma for measuring cholesterol to prepare a concentrated solution of known cholesterol concentration. The total cholesterol concentration in human blood was measured with a commercially available measurement kit (Fuji Drychem 5500), and based on this measurement value, the above-mentioned concentrated cholesterol solution was added to human blood so that the cholesterol concentration was 10%.
Samples were prepared by adding 0, 200 and 400 mg / dl. Dilute an aqueous solution of hydrogen peroxide of known concentration for hydrogen peroxide measurement with distilled water to obtain concentrations of 1, 10, 100 mg /
A sample of dl was prepared.

【0069】結果を表7に示す。血液中のコレステロー
ルまたは水溶液中の過酸化水素濃度上昇に伴い、K/S
値も上昇し、良好な定量性が認められ本発明の試験片が
血液中のコレステロール及び水溶液中の過酸化水素濃度
測定に有効であることが示された。
The results are shown in Table 7. As the concentration of cholesterol in blood or hydrogen peroxide in aqueous solution increases, K / S
The value also increased, and good quantification was observed, showing that the test piece of the present invention is effective for measuring cholesterol in blood and hydrogen peroxide concentration in an aqueous solution.

【0070】[0070]

【表7】 [Table 7]

【0071】実施例4 実施例2に於ける、単糸繊度0.08〜0.5デニー
ル、ナイロン/ポリエステルの複合繊維(鐘紡社製:ザ
ヴィーナMX)よりなる繊維質構造体を用いた試験片を
使用し、被評価試料として血液を用い、実施例1と同様
にして、グルコース濃度測定を行いK/S値を求めた。
Example 4 A test piece using the fibrous structure of Example 2 consisting of a single fiber fineness of 0.08 to 0.5 denier and a nylon / polyester composite fiber (Zavena MX manufactured by Kanebo Co., Ltd.). Was used and blood was used as the sample to be evaluated, and the glucose concentration was measured in the same manner as in Example 1 to determine the K / S value.

【0072】グルコース濃度の異なる血液の調製 成人男性より静脈血を採取し抗凝固剤としてヘパリンを
添加した後、既知量のグルコースを種々添加し、グルコ
ース濃度の異なる血液試料とした。
Preparation of Blood with Different Glucose Concentrations Venous blood was collected from an adult male, heparin was added as an anticoagulant, and various known amounts of glucose were added to prepare blood samples with different glucose concentrations.

【0073】結果を表8に示す。血液中のグルコース濃
度上昇に伴い、K/S値も上昇し良好な定量性が得られ
た。本発明の試験片を使用することにより、ピペット等
を用いた計量操作を行うこと無しに血液中のグルコース
濃度の測定ができることが示された。
The results are shown in Table 8. As the glucose concentration in blood increased, the K / S value also increased, and good quantification was obtained. It was shown that by using the test piece of the present invention, the glucose concentration in blood can be measured without performing a measuring operation using a pipette or the like.

【0074】[0074]

【表8】 [Table 8]

【0075】実施例5 図2(a)に横断面を示す放射型の形状を示す1個のセ
グメントとしてポリアミド、該放射部を補完するくさび
型の形状を示す8個のセグメントとしてポリエステルを
用いた複合繊維40d/25fを用いて40G×33”
の編み機でインターロック組成を編成した。この編み物
を、濃度20%のベンジルアルコールに浸漬してフィブ
リル化処理し細繊度フィラメントを得た後、室温下オー
プンソーパにて湯洗し、185℃でヒートセットし、表
9に示される製品密度及び厚さを有する編物を得た。次
いで、この編物を裁断し、実施例1と同様にしてグルコ
ース濃度測定用試験片を作製した。
Example 5 Polyamide was used as one segment having a radial shape whose cross section is shown in FIG. 2 (a), and polyester was used as eight segments having a wedge shape which complements the radial portion. 40G x 33 "using composite fiber 40d / 25f
The interlock composition was knitted with the knitting machine. The knitted fabric is dipped in benzyl alcohol having a concentration of 20% to be fibrillated to obtain fine filaments, washed with hot water with an open soaper at room temperature, and heat set at 185 ° C. to obtain the products shown in Table 9. A knit having a density and a thickness was obtained. Next, this knitted fabric was cut, and a glucose concentration measuring test piece was prepared in the same manner as in Example 1.

【0076】上記試験片に対し実施例4で使用したのと
同一の人血液を用い、試験片内に血液が吸い込まれる速
度を観察すると共に測定の精度を評価した。尚、吸い込
み速度評価は肉眼で観察して行った。測定精度評価は同
一の試験片を10枚ずつ作製し、100mg/dlのグ
ルコース濃度の試料を同様にして測定を行った結果より
K/Sの平均値、標準偏差を求めて行った。
The same human blood as that used in Example 4 was used for the above test piece, and the rate at which blood was drawn into the test piece was observed and the measurement accuracy was evaluated. The suction speed was evaluated by visual observation. The measurement accuracy was evaluated by preparing ten identical test pieces each and measuring the K / S average value and standard deviation from the results of the same measurement of a sample having a glucose concentration of 100 mg / dl.

【0077】結果を表9に示す。試料として血液を用い
た場合には編み密度が6000を越えない方が、試料の
吸い込みがスムーズに起こり好ましいことが示された。
また、コースとウエルはほぼ揃え、両者の積が3000
〜6000程度の際に測定精度が良好であることが示さ
れた。
The results are shown in Table 9. When blood was used as the sample, it was shown that it is preferable that the knitting density does not exceed 6000 because the sample is smoothly sucked in.
The courses and wells are almost the same, and the product of both is 3000.
It was shown that the measurement accuracy was good at about 6000.

【0078】[0078]

【表9】 [Table 9]

【0079】実施例6 実施例4と同様のグルコース測定用試験片を使用し、実
施例1と同様な方法によりグルコース濃度測定を行っ
た。なお、被検試料としてリンゴジュース及び尿を用い
た。リンゴジュース及び尿に適宜200mg/mlのグ
ルコース水溶液を添加し、それぞれの溶液中グルコース
濃度を変化した試料を調製した。本発明の試験片を用い
てこの試料中のグルコース濃度測定を行って得たK/S
値を表10に示す。表10より明らかなように、ジュー
ス、尿中のグルコース濃度とK/S値は相関し本発明の
試験片がジュース、尿中の成分測定に於いても有効なこ
とが分かった。
Example 6 Using the same glucose measuring test piece as in Example 4, the glucose concentration was measured in the same manner as in Example 1. In addition, apple juice and urine were used as test samples. A 200 mg / ml glucose aqueous solution was appropriately added to apple juice and urine to prepare samples with different glucose concentrations in the respective solutions. K / S obtained by measuring glucose concentration in this sample using the test piece of the present invention
The values are shown in Table 10. As is clear from Table 10, the glucose concentration in juice and urine was correlated with the K / S value, and it was found that the test piece of the present invention was also effective in measuring the components in juice and urine.

【0080】[0080]

【表10】 [Table 10]

【0081】実施例7 支持板上の開口部の端の位置を表11に示した部位に設
置した以外は、実施例4と同様にしてグルコース測定用
試験片を作製し、更に、実施例4または5と同様な方法
により血液中のグルコース濃度測定を行い測定の操作性
及び測定精度を評価した。
Example 7 A glucose measuring test piece was prepared in the same manner as in Example 4 except that the positions of the ends of the openings on the support plate were set at the positions shown in Table 11. Alternatively, the glucose concentration in blood was measured by the same method as in 5, and the operability and measurement accuracy of the measurement were evaluated.

【0082】結果を表11に示す。吸い込み口、開口部
間距離が0.5mmの場合は測定精度は良好であるもの
の、開口部に直接試料が付着しないよう充分気を使わね
ばならなかった。試料量が限られており、かつ粘度の高
い試料を測定する場合に於いては吸い込み口、開口部間
距離が0.5〜10mmが適当であることが示された。
The results are shown in Table 11. Although the measurement accuracy was good when the distance between the suction port and the opening was 0.5 mm, sufficient care had to be taken to prevent the sample from directly adhering to the opening. It has been shown that an appropriate distance between the suction port and the opening is 0.5 to 10 mm when measuring a sample having a limited sample amount and high viscosity.

【0083】[0083]

【表11】 [Table 11]

【0084】実施例8 実施例4と同様にして作製したグルコース測定用試験片
(No.1)と、繊維質構造体表面には両面粘着テープ
を貼り付けず繊維質構造体が支持板間に単に挟み込まれ
て保持されるような形状に作製した試験片(No.2)
に於いて、試料溶液を吸い上げる時間を変化した際の2
50mg/dlのグルコース溶液測定時のK/S値を評
価した。尚、250mg/dlのグルコース溶液は実施
例1と同様にして調製した。
Example 8 A glucose measurement test piece (No. 1) produced in the same manner as in Example 4 and a double-sided adhesive tape were not attached to the surface of the fibrous structure, and the fibrous structure was placed between the supporting plates. A test piece (No. 2) made in such a shape that it is simply sandwiched and held.
2 when changing the time to suck up the sample solution
The K / S value at the time of measuring a 50 mg / dl glucose solution was evaluated. A 250 mg / dl glucose solution was prepared in the same manner as in Example 1.

【0085】両試験片とも試料吸い込みに最低必要な接
触時間は2秒以内であり、表12に示されるごとく両試
験片とも試料接触時間によりK/S値が影響される程度
は小さく精度良く測定することが可能であり、試料接触
時間の変動は実用上問題にならないことが分かった。し
かし、No.1の試験片を用いた場合の方が試料接触時
間の影響はより小さく、高精度測定が要求される場合に
於いてはこの構成が好ましいことが示された。
The minimum contact time required for sucking the sample was less than 2 seconds for both test pieces, and as shown in Table 12, the K / S value was not affected by the sample contact time for both test pieces, and the measurement was performed accurately. It has been found that the fluctuation of the sample contact time does not pose a practical problem. However, no. It was shown that the influence of the sample contact time was smaller when the test piece No. 1 was used, and that this configuration is preferable when high precision measurement is required.

【0086】[0086]

【表12】 [Table 12]

【0087】実施例9 実施例4と同様にして作製したグルコース測定用試験片
(No.1)(吸い込み口形状は図3)と、試料吸い
込み口周辺を図3のように支持板と繊維質構造体を密
着させずに作製した試験片(No.2)を用いて、血液
を試料とした際の試料吸い込み状況を評価した。結果を
表13に示す。両試験片に於いて試料の吸い込みは行わ
れ、両者とも実用上問題なかったが、試験片2の方が試
料の吸い込み開始が速やかに生じ吸い込み操作の信頼性
が高いことが示された。
Example 9 A glucose measuring test piece (No. 1) (sucking port shape is FIG. 3) produced in the same manner as in Example 4 and a sample sucking port and its surroundings were provided with a support plate and a fibrous material as shown in FIG. The test piece (No. 2) produced without adhering the structure to each other was used to evaluate the sample suction state when blood was used as a sample. The results are shown in Table 13. The samples were sucked into both the test pieces, and both had no problem in practical use, but it was shown that the test piece 2 started sucking the sample more quickly and the suction operation was more reliable.

【0088】[0088]

【表13】 [Table 13]

【0089】実施例10 被酸化性の発色剤として、水溶性のTOOSと4−AA
の組み合わせたものを使用する以外は実施例4と同様に
して作製した試験片No.1と、発色剤としてTMBZ
・PSを用いる以外は実施例4と同様にして作製した試
験片No.2、更に、難溶性の被酸化性発色剤、2、7
ージアミノフルオレン、ο−トリジンを用いて実施例4
と同様にして作製した試験片No.3を作製し、各試験
片を用いた際の反射率測定の同時再現性及び色斑の発生
状況について評価した。
Example 10 Water-soluble TOOS and 4-AA were used as oxidizable color formers.
Test piece No. prepared in the same manner as in Example 4 except that the combination of No. 1 and TMBZ as color former
-Test piece No. prepared in the same manner as in Example 4 except that PS was used. 2. Further, a poorly soluble oxidizable color former, 2, 7
Example 4 using diaminofluorene and o-tolidine
Test piece No. 3 was produced, and the simultaneous reproducibility of reflectance measurement and the occurrence of color spots were evaluated when each test piece was used.

【0090】結果を表14に示す。いずれの試験片を用
いた場合も、測定の同時再現性は良好で、実用上充分な
精度を有することが示されたが、No.1、No.2の
試験片に於いては発色剤が滲んでおりクロマト現象が生
じていた。これに対してNo.3の試験片を用いた場合
はこれが生じておらず極めて高精度の測定が行えること
が示された。
The results are shown in Table 14. No matter which test piece was used, the simultaneous reproducibility of the measurement was good and it was shown that the test piece had sufficient accuracy in practical use. 1, No. In the test piece of No. 2, the coloring agent was bleeding and the chromatographic phenomenon occurred. On the other hand, No. When the test piece of No. 3 was used, this did not occur, and it was shown that extremely highly accurate measurement can be performed.

【0091】[0091]

【表14】 [Table 14]

【0092】TOOS:N-Ethyl-N-(2-hydroxy-3-sulfo
propyl)-m-tpluidine,sodium salt,dihydrate 4−AA: 4-Amino antipyrine TMBZ・PS:4-Amino-4-sulfopropylamino-3,3',5,
5'-tetramethylbiphenylsodium salt
TOOS: N-Ethyl-N- (2-hydroxy-3-sulfo
propyl) -m-tpluidine, sodium salt, dihydrate 4-AA: 4-Amino antipyrine TMBZ / PS: 4-Amino-4-sulfopropylamino-3,3 ', 5,
5'-tetramethylbiphenylsodium salt

【0093】実施例11 表1に記載した、毛、絹、ナイロン、ポリエステル及び
セルロース濾紙の5種類の繊維質構造体を用いてグルコ
ース濃度測定用試験片を以下に示す方法に基づき作製
し、水溶液中グルコース濃度測定を行った。
Example 11 A test piece for measuring glucose concentration was prepared by using the five types of fibrous structures of wool, silk, nylon, polyester and cellulose filter paper shown in Table 1 according to the method shown below, and an aqueous solution was prepared. The medium glucose concentration was measured.

【0094】グルコース濃度測定用試験片の製造方法 方法1) 水不浸透性の支持体として厚さ100μmの
ポリエステルシートを用い、このシートに両面粘着テー
プを貼り、図5、に示す2種の形状に裁断した。こ
の2種の支持板を表1記載の繊維質構造体それぞれを挟
持するように貼り合わせ試験片を作製した。この試験片
の測光用開口部より表2に記載した被酸化性発色剤含有
液10μlを供給した後、30℃で、1時間乾燥後、更
に、表2に記載した酵素類含有液10μlを供給し、3
0℃で、3時間乾燥し分析用試験片を得た。
Method for Producing Test Piece for Glucose Concentration Measurement Method 1) A 100 μm-thick polyester sheet was used as a water-impermeable support, and a double-sided adhesive tape was attached to this sheet to form two shapes shown in FIG. Cut into. A test piece was prepared by laminating the two types of support plates so as to sandwich each of the fibrous structures shown in Table 1. After supplying 10 μl of the oxidizable color former-containing solution described in Table 2 from the photometric opening of this test piece, it was dried at 30 ° C. for 1 hour, and then 10 μl of the enzyme-containing solution described in Table 2 was supplied. Then 3
It was dried at 0 ° C. for 3 hours to obtain a test piece for analysis.

【0095】方法2) 方法1)の試験片と同様にして
試験片を作製した後、該試験片の試料吸い込み口を、表
2に記載した被酸化性発色剤含有液に5秒間接触して被
酸化性発色剤含有液を吸い込んだ後、30℃で、1時間
乾燥後、更に同様にして表2に記載した酵素類含有液を
吸い込み、30℃で、3時間乾燥し分析用試験片を得
た。
Method 2) A test piece was prepared in the same manner as the test piece of method 1), and the sample inlet of the test piece was contacted with the oxidizable color former-containing liquid shown in Table 2 for 5 seconds. After sucking the oxidizable color former-containing liquid, it was dried at 30 ° C. for 1 hour, and then similarly sucked the enzyme-containing liquid shown in Table 2 and dried at 30 ° C. for 3 hours to give an analytical test piece. Obtained.

【0096】上記で作製したそれぞれの試験片を用い
て、実施例1と同様にして、グルコース濃度を各種変化
した際のグルコース水溶液の濃度測定及び測定精度評価
を行った。測定精度評価は同一の試験片を10枚ずつ作
製し、100mg/dlのグルコース濃度の試料を同様
にして測定を行った結果よりK/Sの平均値、変動係数
(CV)を求めた。
Using each of the test pieces produced above, the concentration of the glucose aqueous solution was measured and the measurement accuracy was evaluated in the same manner as in Example 1 when the glucose concentration was variously changed. For the evaluation of measurement accuracy, ten identical test pieces were prepared, and the average value of K / S and the coefficient of variation (CV) were obtained from the results of the same measurement of a sample having a glucose concentration of 100 mg / dl.

【0097】各試験片を用いて測定を行った際の結果を
それぞれ表15、16に示す。いずれの試験片に於いて
もグルコース濃度が高くなるにつれてK/S値の増加が
認められグルコース濃度測定に有効であることが示され
た。
Tables 15 and 16 show the results when the measurement was performed using each test piece. In each test piece, an increase in K / S value was observed as the glucose concentration increased, indicating that it is effective for measuring the glucose concentration.

【0098】[0098]

【表15】 [Table 15]

【0099】[0099]

【表16】 [Table 16]

【0100】実施例12 表4に示す単糸繊度1デニール以下の細繊度合成繊維よ
り成る繊維質構造体を用いる以外は、実施例11の製造
方法と同様にしてグルコース濃度測定用試験片を作製
し、更に実施例1と同様な方法によりグルコース水溶液
の濃度測定を行いK/S値及び測定精度を求めた。評価
結果を表17、18に示す。、いずれの試験片に於いて
もグルコース濃度上昇に伴い、K/S値が上昇しかつ良
好な精度が認められた。
Example 12 A glucose concentration measuring test piece was produced in the same manner as in the production method of Example 11 except that a fibrous structure composed of fine fineness synthetic fibers having a single yarn fineness of 1 denier or less shown in Table 4 was used. Then, the glucose solution concentration was measured by the same method as in Example 1 to obtain the K / S value and the measurement accuracy. The evaluation results are shown in Tables 17 and 18. In each of the test pieces, the K / S value increased with the increase in glucose concentration, and good accuracy was observed.

【0101】[0101]

【表17】 [Table 17]

【0102】[0102]

【表18】 [Table 18]

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の分析用試験片の一実施態様を示す説明
図。
FIG. 1 is an explanatory view showing an embodiment of an analytical test piece of the present invention.

【図2】本発明で使用する繊維質構造体を構成するフィ
ブリル化複合繊維の横断面図。
FIG. 2 is a cross-sectional view of a fibrillated composite fiber that constitutes a fibrous structure used in the present invention.

【図3】本発明の分析用試験片の試料吸い込み口周辺部
の説明図。
FIG. 3 is an explanatory view of a portion around a sample suction port of the analytical test piece of the present invention.

【図4】本発明の分析用試験片の評価に使用した反射率
読み取り装置の概略説明図。
FIG. 4 is a schematic explanatory view of a reflectance reading device used for evaluation of an analytical test piece of the present invention.

【図5】本発明の分析用試験片の一実施態様を示す説明
図。
FIG. 5 is an explanatory view showing one embodiment of the analytical test piece of the present invention.

【符号の説明】[Explanation of symbols]

1 繊維質構造体 2 水不浸透性支持板 3 試料吸い込み口 4 測定用開口部 1 Fibrous structure 2 Water impermeable support plate 3 Sample suction port 4 Measurement opening

───────────────────────────────────────────────────── フロントページの続き (72)発明者 高瀬 清 兵庫県西宮市上田東町4番38−404号 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Takase No. 38-404 Uedahigashi-cho, Nishinomiya-shi, Hyogo Prefecture

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 液体試料中の成分を分析するための試験
片であって、試料中の成分と反応する試薬を含有してな
る薄片状の繊維質構造体を、該繊維質構造体の一端が液
体試料吸い込み口となるよう、2枚の水不浸透性支持板
間に三者端部が略揃うようにして挾持し、更に、該水不
浸透性支持板の一方に、測定用開口部を設けてなること
を特徴とする分析用試験片。
1. A test piece for analyzing a component in a liquid sample, comprising a flaky fibrous structure containing a reagent that reacts with a component in the sample, and one end of the fibrous structure. So as to serve as a liquid sample suction port, the two water-impermeable support plates are sandwiched so that their three end portions are substantially aligned, and one of the water-impermeable support plates is provided with a measurement opening. A test piece for analysis, characterized by comprising:
【請求項2】 繊維質構造体を構成する繊維が、1デニ
ール以下の合成繊維フィラメントであることを特徴とす
る請求項1記載の分析用試験片。
2. The analytical test piece according to claim 1, wherein the fibers constituting the fibrous structure are synthetic fiber filaments having a denier of 1 or less.
【請求項3】 繊維質構造体に含有される、試料中の成
分と反応する試薬の一つが、水難溶性の被酸化性発色剤
であることを特徴とする請求項1記載の分析用試験片。
3. The analytical test piece according to claim 1, wherein one of the reagents contained in the fibrous structure and which reacts with the components in the sample is a poorly water-soluble oxidizable color former. .
JP22638193A 1993-08-18 1993-08-18 Test piece for analysis Pending JPH0755795A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22638193A JPH0755795A (en) 1993-08-18 1993-08-18 Test piece for analysis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22638193A JPH0755795A (en) 1993-08-18 1993-08-18 Test piece for analysis

Publications (1)

Publication Number Publication Date
JPH0755795A true JPH0755795A (en) 1995-03-03

Family

ID=16844234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22638193A Pending JPH0755795A (en) 1993-08-18 1993-08-18 Test piece for analysis

Country Status (1)

Country Link
JP (1) JPH0755795A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006258773A (en) * 2005-03-18 2006-09-28 Suzuken Co Ltd Biological fluid collecting instrument
US7824616B2 (en) 2001-07-27 2010-11-02 Arkray, Inc. Analyzing instrument
WO2021080237A1 (en) * 2019-10-25 2021-04-29 주식회사 원드롭 Sample-collecting device capable of quantitative sampling

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7824616B2 (en) 2001-07-27 2010-11-02 Arkray, Inc. Analyzing instrument
US8425841B2 (en) 2001-07-27 2013-04-23 Arkray, Inc. Analyzing instrument
JP2006258773A (en) * 2005-03-18 2006-09-28 Suzuken Co Ltd Biological fluid collecting instrument
JP4500191B2 (en) * 2005-03-18 2010-07-14 株式会社スズケン Biological fluid collection device
WO2021080237A1 (en) * 2019-10-25 2021-04-29 주식회사 원드롭 Sample-collecting device capable of quantitative sampling

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