JP2005091169A - Optical measuring microreactor and optical measuring method using it - Google Patents

Optical measuring microreactor and optical measuring method using it Download PDF

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Publication number
JP2005091169A
JP2005091169A JP2003325164A JP2003325164A JP2005091169A JP 2005091169 A JP2005091169 A JP 2005091169A JP 2003325164 A JP2003325164 A JP 2003325164A JP 2003325164 A JP2003325164 A JP 2003325164A JP 2005091169 A JP2005091169 A JP 2005091169A
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detection unit
microreactor
optical measurement
substrate
sample
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JP4371745B2 (en
Inventor
Satoshi Tamaki
聡史 玉木
Koichiro Iwasa
航一郎 岩佐
Tetsuya Ishii
徹哉 石井
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Sekisui Chemical Co Ltd
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Sekisui Chemical Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an extremely small-sized optical measuring microreactor capable of measuring a very small amount of a substance having a low concentration with good sensitivity, and an optical measuring method using the same. <P>SOLUTION: In the optical measuring microreactor, two substrates are stacked, a fine flow channel for injecting a sample containing a detection substance and the detection part connected to the fine flow channel are formed between the substrates, the detection part has the length from the vicinity of one side surface of each of the substrates to the vicinity of the other side surface thereof, gap parts are formed on both sides of the detection part and the light entering from one side surfaces of the substrates is reflected by the side surfaces of the gap parts to traverse the detection part a plurality of times before emitted from the other side surfaces of the substrates. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、複数枚の基板の間に検出物質を含有する試料を注入する微細流路と、該微細流路に接続された検出部が形成されている光学測定用マイクロリアクター及びそれを用いた光学測定方法に関する。   The present invention uses a microchannel for injecting a sample containing a detection substance between a plurality of substrates, an optical measurement microreactor in which a detection unit connected to the microchannel is formed, and the same. The present invention relates to an optical measurement method.

最近、医療診断を患者の近傍で行うベッドサイド診断、大気や水や土壌中の環境汚染物
質のモニタリング、食品の安全性検査等現場において短時間に安価に診断したり分析する
技術のニーズは非常に高くなってきている。
Recently, there is a great need for technology to diagnose and analyze at low cost in the field, such as bedside diagnosis in the vicinity of patients, monitoring of environmental pollutants in the air, water and soil, and food safety inspection. It is getting higher.

例えば、従来高価且つ大型の装置を必要とした分析を、持ち運び可能な小型の分析装置
が代替することができれば、大病院にしか設置できなかった分析装置を開業医でも設置、
利用することが可能になり、診断結果を患者に簡便に且つ早期にフィードバックすること
が可能になる。又、高齢者の健康指標を高齢者の家族が測定し、その健康指標数値を在宅
管理したり、病院に定期的に送信して病院で管理することにより在宅医療環境がより優れ
たものとなる。
For example, if an analysis that previously required an expensive and large device could be replaced by a small portable analyzer, a practitioner could install an analyzer that could only be installed in a large hospital,
It becomes possible to use it, and it is possible to easily and quickly feed back the diagnosis result to the patient. In addition, the home health care environment can be improved by measuring the health index of the elderly by the family of the elderly and managing the health index numerical value at home or by regularly sending it to the hospital and managing it at the hospital. .

又、環境ホルモン、ダイオキシン等の環境汚染物質を、高価且つ大型装置を使用するこ
となく、簡易測定することができれば、簡単且つ安価に環境診断することができる。更に
、持ち運び可能な小型の分析装置を用いて現場で環境汚染物質を分析することができれば
、よりきめ細かい安全環境を供出することができる。
If environmental pollutants such as environmental hormones and dioxins can be easily measured without using an expensive and large apparatus, environmental diagnosis can be performed easily and inexpensively. Furthermore, if environmental pollutants can be analyzed on site using a small portable analyzer, a more detailed safe environment can be provided.

このような測定を簡易に行うためには、微量の試料で、高感度に分析検出が行えること
が必要である。そのために、キャピラリーガスクロマトグラフィー(CGC)、キャピラ
リー液体クロマトグラフィー(CLC)、誘導型プラズマ(ICP)等で分離し、質量分
析計(MS)で検出するGC−MS、LC−MS、ICP−MS等が微量、高感度で分析
できる方法として広く使用されてきている。
In order to perform such a measurement easily, it is necessary to be able to perform analytical detection with high sensitivity using a very small amount of sample. For this purpose, GC-MS, LC-MS, ICP-MS, which are separated by capillary gas chromatography (CGC), capillary liquid chromatography (CLC), induction plasma (ICP), etc., and detected by mass spectrometer (MS) Have been widely used as a method that can be analyzed with a small amount and high sensitivity.

しかしながら、これらの装置は高価で大掛かりな装置なので、持ち運ぶことは困難であ
り、所望の場所に設置するには、非常に高いコストがかかる為、上記のような幅広い医療
診断や環境診断のニーズには適合し得なかった。
However, since these devices are expensive and large-scale devices, they are difficult to carry around, and it is very expensive to install in a desired location, which meets the needs for a wide range of medical diagnosis and environmental diagnosis as described above. Could not fit.

これを、実際に現場を持ち運ぶ目的の製品形態としてなした例として、電気化学センサ
ー等の分析機構をマイクロリアクター中に備える形で幾つかの製品が開発されている。マ
イクロリアクターとは、掌サイズ程度のチップ内に、マイクロスケールの流体移送手段や
反応部等を含むものの総称であり、例えば、リアクター内部に幅0.1μm〜1500μ
m程度の微細流路を内包している。
As an example of making this as a product form for the purpose of actually carrying the site, several products have been developed with an analysis mechanism such as an electrochemical sensor in the microreactor. A microreactor is a generic term for a microscale fluid transfer means, a reaction part, etc. in a palm-sized chip. For example, the reactor has a width of 0.1 μm to 1500 μm.
Including a fine channel of about m.

マイクロリアクター内に電気化学センサーを備えた例として、例えばイオン選択性電極
、即ち、作用極上に形成した高分子膜の膜電位を計測することにより目的電解質イオンを
選択的に計測する電極が搭載されたものが挙げられる(例えば、特許文献1参照。)。
特開2000−65791号公報
As an example of an electrochemical sensor in a microreactor, for example, an ion-selective electrode, that is, an electrode that selectively measures target electrolyte ions by measuring the membrane potential of a polymer membrane formed on the working electrode is mounted. (For example, refer to Patent Document 1).
JP 2000-65791 A

上記マイクロリアクターでは、イオン選択性電極としてマイクロ電極を用いるとともに
、マイクロレベルの幅及び深さを有する流体移送用の流路を適宜使用することにより、掌
サイズの微小な分析システムを実現している。システムが非常に小さいため、持ち運びが
可能であり、大掛かりな測定装置を用いることなしに、血液中成分を測定することが出来
る。
The microreactor uses a microelectrode as an ion selective electrode and realizes a palm-sized microanalysis system by appropriately using a fluid transfer channel having a microlevel width and depth. . Since the system is very small, it can be carried and blood components can be measured without using a large measuring device.

しかし、マイクロリアクターにおいては、微量の試料を用いて微量物質の測定をするの
であるから、電気化学センサーを用いて感度よく測定することはできなかった。
However, in a microreactor, since a very small amount of sample is used to measure a trace amount of substance, it cannot be measured with high sensitivity using an electrochemical sensor.

又、微量物質の測定に紫外線吸収法、赤外線吸収法、蛍光分析法等の光学測定方法が知
られており、これらの光学測定方法をマイクロリアクターに適用することも可能である。
しかし、これらの光学測定方法においても、測定すべき微量物質の濃度は薄く、光学的に
利用可能な測定距離が短いので感度よく測定することはできなかった。
In addition, optical measurement methods such as an ultraviolet absorption method, an infrared absorption method, and a fluorescence analysis method are known for measuring trace substances, and these optical measurement methods can also be applied to a microreactor.
However, even in these optical measurement methods, the concentration of the trace substance to be measured is thin, and the measurement distance that can be used optically is short, so that the measurement cannot be performed with high sensitivity.

本発明の目的は、上記欠点に鑑み、非常に小型で簡便に且つ濃度の薄い微量物質を感度
よく測定することができる光学測定用マイクロリアクター及びその光学測定用マイクロリ
アクターを用いた光学測定方法を提供することにある。
In view of the above-described drawbacks, an object of the present invention is to provide an optical measurement microreactor capable of measuring a very small, simple and thin trace substance with high sensitivity and an optical measurement method using the optical measurement microreactor. It is to provide.

請求項1記載の光学測定用マイクロリアクターは、複数枚の基板が積層され、基板の間に検出物質を含有する試料を注入する微細流路と、該微細流路に接続された検出部が形成されているマイクロリアクターであって、該検出部は前記基板の1側面近傍から他側面近傍までの長さを有し、検出部の両側に空隙部が形成されており、前記基板の1側面から入射された光線は空隙部の側面で反射され、検出部を複数回横切った後、前記基板の他側面から出光するようになされていることを特徴とする。   The microreactor for optical measurement according to claim 1, wherein a plurality of substrates are laminated, and a microchannel for injecting a sample containing a detection substance between the substrates and a detection unit connected to the microchannel are formed. The detection unit has a length from the vicinity of one side surface of the substrate to the vicinity of the other side surface, and gaps are formed on both sides of the detection unit, from one side surface of the substrate. The incident light beam is reflected by the side surface of the gap, and after passing through the detection unit a plurality of times, it is emitted from the other side surface of the substrate.

上記基板の素材は、光線透過性を有していれば、特に限定されるものではなく、例えば
、従来から使用されてきている、ガラス、石英、シリコン等の無機材料が挙げられる。こ
れら無機材料は精度、加工性等が優れており、例えば、半導体微細加工技術において広く
用いられている光リソグラフィー技術を利用すれば、ガラスやシリコン基板上にミクロン
オーダーの溝を自在に形成することができる。
The material of the substrate is not particularly limited as long as it has light transmittance, and examples thereof include conventionally used inorganic materials such as glass, quartz, and silicon. These inorganic materials are excellent in accuracy, workability, etc. For example, if optical lithography technology widely used in semiconductor microfabrication technology is used, micron-order grooves can be freely formed on glass or silicon substrates. Can do.

しかしながら、光学測定用マイクロリアクターを大量に、容易に且つ安価に生産し、か
つ廃棄出来ることも重要である。このような場合、材料そのものが高価であるガラスやシ
リコンの使用は望ましいとはいえない。
However, it is also important that the microreactor for optical measurement can be produced in large quantities easily and inexpensively and can be discarded. In such a case, it is not desirable to use glass or silicon whose materials themselves are expensive.

又、医療の現場においては、ガラス製の製品を使う場合には、廃棄の際に適切な処理費
用を支払うことが義務付けられており、それ以外にも軽い、割れない等のメリットがあり
、さらには、転写金型を利用した射出成形やホットプレス成形を行うことにより、非常に
高い生産性にて表面に溝や孔を形成することが可能であることから、基板は高分子樹脂か
ら形成されるのが好ましい。
Also, in the medical field, when using glass products, it is obliged to pay an appropriate disposal cost at the time of disposal, and there are other advantages such as lightness and not cracking. The substrate is made of polymer resin because it is possible to form grooves and holes on the surface with very high productivity by performing injection molding and hot press molding using a transfer mold. It is preferable.

上記高分子樹脂の種類は、特に限定されるものではないが、加熱により簡単に表面加工
出来るという点では、熱可塑性樹脂が好ましく、例えば、ポリオレフィン系樹脂、ポリス
チレン系樹脂、ポリ乳酸系樹脂、ポリメチルメタクリレート樹脂、ポリカーボネート系樹
脂、熱可塑性飽和ノルボルネン樹脂、シクロオレフィン樹脂に代表される嵩高脂環式オレ
フィン樹脂等が挙げられる。
The type of the polymer resin is not particularly limited, but a thermoplastic resin is preferable in that it can be easily surface-treated by heating. For example, a polyolefin resin, a polystyrene resin, a polylactic acid resin, Examples thereof include a methyl methacrylate resin, a polycarbonate-based resin, a thermoplastic saturated norbornene resin, and a bulky alicyclic olefin resin typified by a cycloolefin resin.

これらの高分子樹脂を用いる際には、その複屈折が問題となる場合がある。その抑制の
為に各種方法が知られているが、例を挙げると、負の配向複屈折を示すポリメチルメタク
リレート樹脂と正の配向複屈折を示すポリビニリデンフロライドをブレンドすることによ
り、複屈折を相殺するポリマーブレンドや、高分子樹脂中に炭酸ストロンチウム、シリカ
ナノ粒子、クレイなどの無機材料を分散させるナノコンポジット化が挙げられる。
When these polymer resins are used, the birefringence may be a problem. Various methods are known for its suppression. For example, birefringence can be obtained by blending polymethylmethacrylate resin exhibiting negative orientation birefringence and polyvinylidene fluoride exhibiting positive orientation birefringence. And a nano-composite in which inorganic materials such as strontium carbonate, silica nanoparticles, and clay are dispersed in a polymer resin.

上記光学測定用マイクロリアクターは、検査部において光線が入射されるのであるから
、光線透過性が優れているのが好ましく、ポリメチルメタクリレート樹脂、ポリカーボネ
ート樹脂及び熱可塑性飽和ノルボルネン樹脂及びこれらをベースとしたポリマーブレンド
、ナノコンポジット化材料がより好ましい。
The optical measurement microreactor is preferably excellent in light transmittance since light is incident on the inspection section, and is based on polymethyl methacrylate resin, polycarbonate resin, thermoplastic saturated norbornene resin, and these. More preferred are polymer blends and nanocomposite materials.

一方、熱硬化性樹脂は、加熱により可塑化して簡単に表面加工するという利点は有さな
いが、予め硬化剤等を混合した前駆体液を転写金型に導入しておき、その場硬化させるこ
とにより、樹脂表面を賦形することが可能である。
On the other hand, the thermosetting resin does not have the advantage of being easily plasticized by heating, but it does not have the advantage of being surface-processed, but a precursor liquid mixed with a curing agent or the like is previously introduced into a transfer mold and cured in situ. Thus, it is possible to shape the resin surface.

この場合、前駆体が液状のため、転写金型の形状をより忠実に転写するという利点があ
る。又、一般に、静的に硬化された樹脂は、低い線膨張率、低い成形収縮率を示すことか
らも、有利に用いることができる。このような熱硬化樹脂としては、コストや易取扱い性
の点から、エポキシ樹脂及びこれらをベースとしたナノコンポジット化材料を有利に用い
ることができる。
In this case, since the precursor is liquid, there is an advantage that the shape of the transfer mold is transferred more faithfully. In general, a statically cured resin can be advantageously used because it exhibits a low linear expansion coefficient and a low molding shrinkage ratio. As such a thermosetting resin, an epoxy resin and a nanocomposite material based thereon can be advantageously used from the viewpoint of cost and easy handling.

上記基板は、1種類の素材単独で形成されてもよいし、2種類以上の素材で形成されて
もよい。又、検出部のみ光線透過性の優れた素材で構成し、他の部分を光線透過性の優れ
ていない素材で構成してもよい。尚、基板の屈折率は1.05〜2.50が好ましい。
The substrate may be formed of one kind of material alone, or may be formed of two or more kinds of materials. Alternatively, only the detection part may be made of a material having excellent light transmittance, and the other part may be made of a material having poor light transmittance. The refractive index of the substrate is preferably 1.05 to 2.50.

上記基板が積層され、基板の間に検出物質を含有する試料を注入する微細流路と該微細
流路に接続された検出部が形成されている。微細流路は、検出物質を含有する試料が流動
可能であることが必要であり、一般に、その幅及び高さは0.1〜1500μmが好まし
い。
The substrate is stacked, and a fine channel for injecting a sample containing a detection substance between the substrates and a detection unit connected to the fine channel are formed. The fine channel needs to allow the sample containing the detection substance to flow, and generally the width and height are preferably 0.1 to 1500 μm.

又、微細流路の試料の注入口と検出部の間に、検出物質の濃縮部(例えば、液体クロマ
トグラフカラム)が設置されてもよい。
Further, a detection substance concentration section (for example, a liquid chromatograph column) may be installed between the sample inlet and the detection section in the fine channel.

上記検出部は、基板の1側面から入射された光線が空隙部の側面で反射され、複数回横
切るのであるから、基板の1側面近傍から他側面近傍までの長さを有しており、その平面
形状は略長方形であるのが好ましい。
The detector has a length from the vicinity of one side of the substrate to the vicinity of the other side because the light incident from one side of the substrate is reflected by the side of the gap and crosses multiple times. The planar shape is preferably a substantially rectangular shape.

基板の1側面から検出部までの距離が長いと、光線が入射された時と出光する時に基板
材料による吸収が大きくなり測定精度が低下するので、近傍とは5mm以下が好ましく、
より好ましくは1mm以下である。
If the distance from one side surface of the substrate to the detection unit is long, absorption by the substrate material increases when light is incident and when light is emitted, and the measurement accuracy decreases, so the vicinity is preferably 5 mm or less,
More preferably, it is 1 mm or less.

又、側壁が凹凸や屈曲面を有していると入射光線が乱反射して測定感度が低下するので
、対向する側壁は互いに平行な平面であり、且つ、基板の上面及び下面に垂直な平面であ
るのが好ましい。
In addition, if the side walls have irregularities or bent surfaces, the incident light is irregularly reflected and the measurement sensitivity is lowered. Therefore, the opposing side walls are planes parallel to each other and are planes perpendicular to the upper and lower surfaces of the substrate. Preferably there is.

上記微細流路が、基板の1側面から検出部に接続されると、この基板の1側面から光線
を入射して測定するのであるから、測定の邪魔になり測定感度が低下するので、微細流路
は、微細流路内の試料の流れ方向と、検出部内の試料の流れ方向が略垂直になるように、
検出部に接続されるのが好ましい。
When the fine flow path is connected to the detection unit from one side surface of the substrate, light is incident from one side surface of the substrate and measurement is performed, which hinders measurement and decreases measurement sensitivity. The path is such that the flow direction of the sample in the fine flow path is substantially perpendicular to the flow direction of the sample in the detection unit.
It is preferable to be connected to the detection unit.

又、接続部分に屈曲面があると入射光線が乱反射して測定感度が低下することがあるの
で、微細流路の側壁は互いに平行な平面であり、検出部の側壁と屈曲面を形成することな
く接続されるのが好ましい。
In addition, if there is a bent surface at the connection part, incident light may be irregularly reflected and the measurement sensitivity may be lowered. Therefore, the side walls of the microchannel are planes parallel to each other and form the side wall and the bent surface of the detection unit. It is preferable that they are connected together.

検出部の長さは、光学測定用マイクロリアクターの幅と略同一であり、一般に5mm〜
5cmが好ましく、検出部の幅及び高さは、入射光線が光学測定用マイクロリアクターの
1側面から他側面まで透過することができればよいので、一般に0.1〜1500μmが
好ましい。
The length of the detection part is substantially the same as the width of the microreactor for optical measurement.
5 cm is preferable, and the width and height of the detection unit are generally preferably 0.1 to 1500 μm, as long as incident light can pass from one side surface to the other side surface of the microreactor for optical measurement.

上記光学測定用マイクロリアクターには、検出部の両側に空隙部が形成されており、前
記基板の1側面から入射された光線は空隙部の側面で反射されるようになされている。従
って、光線が全反射されるように、空隙部の検出部に近い側面は検出部の側壁に平行な平
面であるのが好ましい。
In the optical measurement microreactor, gaps are formed on both sides of the detection unit, and light incident from one side of the substrate is reflected by the side of the gap. Therefore, it is preferable that the side surface close to the detection unit of the gap is a plane parallel to the side wall of the detection unit so that the light beam is totally reflected.

又、検出部の側壁と空隙部の検出部に近い面との幅が、検出部の幅より相当大きくなる
と、光線が検出部内を通過する距離が相対的に短くなり、検出感度が低下する。その為、
検出部の幅と、検出部の側壁と空隙部の検出部に近い面との幅の比が1.1以上であるこ
とが好ましい。
Further, when the width between the side wall of the detection unit and the surface of the gap near the detection unit is considerably larger than the width of the detection unit, the distance that the light beam passes through the detection unit becomes relatively short, and the detection sensitivity is lowered. For that reason,
It is preferable that the ratio of the width of the detection part to the width of the side wall of the detection part and the surface of the gap near the detection part is 1.1 or more.

又、2枚の間に形成された試料排出用微細通路が検出部の出口側に接続され、該試料排
出用微細通路に廃液貯蔵部等が連結され、端部が廃液排出口又はガス抜き口となされてい
てもよい。
Also, the sample discharge micro passage formed between the two sheets is connected to the outlet side of the detection section, and the waste liquid storage section is connected to the sample discharge micro path, and the end is the waste liquid discharge port or the gas vent port. It may be.

上記試料排出用微細流路が、基板の他端面から検出部に接続されると、測定の邪魔にな
り測定感度が低下するので、試料排出用微細流路は、試料排出用微細流路内の試料の流れ
方向と、検出部内の試料の流れ方向が略垂直になるように、検出部に接続されるのが好ま
しい。
When the sample discharge micro-channel is connected to the detection unit from the other end surface of the substrate, the measurement sensitivity is reduced and the measurement sensitivity is lowered. Therefore, the sample discharge micro-channel is disposed within the sample discharge micro-channel. It is preferable to connect to the detection unit so that the flow direction of the sample and the flow direction of the sample in the detection unit are substantially perpendicular.

又、接続部分に屈曲面があると入射光線が乱反射して測定感度が低下することがあるの
で、試料排出用微細流路の側壁は互いに平行な平面であり、検出部の側壁と屈曲面を形成
することなく接続されるのが好ましい。
In addition, if there is a bent surface at the connecting portion, the incident light may be irregularly reflected and the measurement sensitivity may be lowered. Therefore, the side walls of the sample discharge microchannel are planes parallel to each other, and the side wall and the bent surface of the detection unit are It is preferable to connect without forming.

試料排出用微細流路は、排出する試料が流動可能であることが必要であり、一般に、そ
の幅及び高さは0.1〜1500μmが好ましい。
The fine channel for sample discharge needs to allow the sample to be discharged to flow, and generally the width and height are preferably 0.1 to 1500 μm.

請求項9記載の光学測定方法は請求項1〜8のいずれか1項記載の光学測定用マイクロ
リアクターの微細通路から、検出物質を含有する試料を検出部に注入し、基板の1側面か
ら光線を入射し、空隙部の側面で反射され、検出部を複数回横切った後、基板の他側面か
ら出光した光線を光学測定装置で受光して検出物質を測定することを特徴とする。
The optical measurement method according to claim 9 is a method in which a sample containing a detection substance is injected into the detection unit from the micropassage of the optical measurement microreactor according to any one of claims 1 to 8, and a light beam is emitted from one side of the substrate. , Is reflected on the side surface of the gap, traverses the detection portion a plurality of times, and then the light emitted from the other side surface of the substrate is received by an optical measurement device to measure the detection substance.

基板の1側面から、検出部内の試料の流れ方向に対し一定角度を有し、基板の上面又は
下面と略平行に光線を入射すると、光線は検出部内及び検出部の側壁を通過し、空隙部の
検出部に近い側面で反射される。
When a light beam is incident from one side surface of the substrate with a certain angle with respect to the flow direction of the sample in the detection unit and substantially parallel to the upper surface or the lower surface of the substrate, the light beam passes through the detection unit and the side wall of the detection unit, and the gap portion It is reflected on the side surface close to the detector.

反射された光線は検出部の側壁を通過し、再度、検出部内及び検出部の反対側の側壁を
通過し、反対側の空隙部の検出部に近い側面で反射され検出部内に返ってくる。光線は、
この反射を繰り返して基板の他側面に到達し、そこから出光する。
The reflected light beam passes through the side wall of the detection unit, passes again through the detection unit and the side wall on the opposite side of the detection unit, is reflected by the side surface close to the detection unit of the gap portion on the opposite side, and returns to the detection unit. Rays of light
This reflection is repeated to reach the other side of the substrate and emit light therefrom.

反射することにより、検出部中(試料中)を通過する光線の距離が長くなり、検出感度
が向上する。従って、検出部中(試料中)を通過する光線の距離は長いほど好ましいが、
光線の反射率、減衰等を考慮すると、光線が検出部を横切る総距離が、検出部の長さの1
.1倍以上にするのが好ましく、より好ましくは1.15〜2.0倍である。
By reflecting, the distance of the light beam that passes through the detection unit (in the sample) is increased, and the detection sensitivity is improved. Therefore, the longer the distance of the light beam that passes through the detector (in the sample), the better.
Considering the reflectivity, attenuation, etc. of the light beam, the total distance that the light beam crosses the detection unit is 1 of the length of the detection unit.
. It is preferable to make it 1 times or more, more preferably 1.15 to 2.0 times.

上記、検出部中(試料中)を通過する光線の距離を達成するには、光線を検出部の試料
の流れ方向に対して20〜60度になるように入射するのが好ましい。
In order to achieve the above-described distance of the light beam passing through the detection unit (in the sample), it is preferable that the light beam is incident so as to be 20 to 60 degrees with respect to the flow direction of the sample in the detection unit.

又、測定する際の温度が変化すると、測定結果が変動し、測定精度が低下するので、検
出部の温度を一定に制御して測定するのが好ましく、好ましい温度範囲は15〜25℃で
ある。温度を一定に制御する方法としては、例えば、恒温室で測定する方法、検出部の周
囲にヒーター、冷却装置等の微細温度制御装置を設置する方法等が挙げられる。
In addition, if the temperature at the time of measurement changes, the measurement result fluctuates and the measurement accuracy decreases. Therefore, it is preferable to measure the temperature of the detection unit at a constant temperature, and the preferable temperature range is 15 to 25 ° C. . Examples of the method for controlling the temperature constant include a method of measuring in a temperature-controlled room, and a method of installing a fine temperature control device such as a heater and a cooling device around the detection unit.

入射する光線としては、一般に光学測定で使用されている光線であれば、特に限定さ
れず、例えば、紫外線、赤外線等が挙げられる。また出射する光線としては、入射光線以
外にも、入射光線により検出部中で発生した蛍光が挙げられる。
The incident light is not particularly limited as long as it is a light generally used in optical measurement, and examples thereof include ultraviolet rays and infrared rays. In addition to incident light, the emitted light includes fluorescence generated in the detector by the incident light.

又、基板の他側面から出光した光線を光学測定装置で受光して検出物質を測定するので
あり、光学測定装置としては、照射された光線に従い、一般に光学測定で使用されている
光学測定装置であれば、特に限定されず、例えば、紫外線吸収分析装置、赤外線分析装置
、蛍光分析装置等が挙げられる。
In addition, a light beam emitted from the other side of the substrate is received by an optical measurement device and a detection substance is measured. The optical measurement device is an optical measurement device generally used for optical measurement according to the irradiated light beam. If there is, it will not specifically limit, For example, a ultraviolet-ray-absorption analyzer, an infrared analyzer, a fluorescence analyzer etc. are mentioned.

次に、本発明の光学測定用マイクロリアクター及びそれを用いた光学測定法を図面を参
照して説明する。図1は、本発明の光学測定用マイクロリアクターの一例を示す平面図で
あり、図2は図1におけるA−A断面図であり、図3は図1におけるBの拡大図であって
、光線の透過状況を示している。
Next, an optical measurement microreactor of the present invention and an optical measurement method using the same will be described with reference to the drawings. 1 is a plan view showing an example of an optical measurement microreactor according to the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is an enlarged view of B in FIG. Shows the transmission status of

図中1はポリメチルメタクリレート樹脂製の上部基板であり、2はポリメチルメタクリ
レート樹脂製の下部基板である。上部基板1及び下部基板2の長さは2cm、幅1cm、
厚さ3mmの板状体であり、微細流路3、検出部4、試料排出用微細流路5及び空隙部6
、61を形成するための溝が形成されており、両者を溝が当接されるように積層すること
により光学測定用マイクロリアクターが形成されている。
In the figure, 1 is an upper substrate made of polymethyl methacrylate resin, and 2 is a lower substrate made of polymethyl methacrylate resin. The length of the upper substrate 1 and the lower substrate 2 is 2 cm, the width is 1 cm,
It is a plate-like body having a thickness of 3 mm, and includes a fine channel 3, a detection unit 4, a sample discharge fine channel 5, and a gap 6
, 61 are formed, and a microreactor for optical measurement is formed by laminating the two so that the grooves are in contact with each other.

微細流路3は断面形状は、幅300μm、深さ100μmの長方形であり、その側壁は
上部基板1の上面及び下部基板2下面と垂直であり、且つ、上部基板1及び下部基板2の
側面11と平行であって、側面11と側面に近い側壁32の間隔が1mmになるように形
成されている。
The cross-sectional shape of the microchannel 3 is a rectangle having a width of 300 μm and a depth of 100 μm, its side walls are perpendicular to the upper surface of the upper substrate 1 and the lower surface of the lower substrate 2, and the side surfaces 11 of the upper substrate 1 and the lower substrate 2. And the distance between the side surface 11 and the side wall 32 close to the side surface is 1 mm.

検出部4の平面形状は長さ8mm、幅500μmの長方形であり、断面形状は幅500
μm、深さ100μmの長方形である。その長さ方向の側壁41、42は上部基板1の上
面及び下部基板2下面と垂直であり、且つ、上部基板1及び下部基板2の側面11と垂直
に形成され、幅方向の側壁43、44は上部基板1の上面及び下部基板2下面と垂直であ
り、且つ、上部基板1及び下部基板2の側面11と平行に形成されており、微細流路3の
長さ方向と検出部4長さ方向が垂直になるように形成されている。
The planar shape of the detection unit 4 is a rectangle having a length of 8 mm and a width of 500 μm, and the cross-sectional shape is a width of 500.
It is a rectangle of μm and depth of 100 μm. The side walls 41 and 42 in the length direction are perpendicular to the upper surface of the upper substrate 1 and the lower surface of the lower substrate 2 and perpendicular to the side surface 11 of the upper substrate 1 and lower substrate 2. Is perpendicular to the upper surface of the upper substrate 1 and the lower surface of the lower substrate 2, and is formed in parallel with the side surface 11 of the upper substrate 1 and the lower substrate 2, and the length direction of the microchannel 3 and the length of the detection unit 4 It is formed so that the direction is vertical.

微細流路3は、上部基板1及び下部基板2の側面に近い側の側壁32が、検出部4の上
部基板1及び下部基板2の側面に近い側の幅方向の側壁43と面一なるように接続され、
上部基板1及び下部基板2の側面11に遠い側の側壁33は、検出部4の長さ方向の側壁
41に垂直に接続されている。又、微細流路3の反対側(上流側)には試料注入口31が
穿設されている。
The microchannel 3 is such that the side wall 32 near the side surfaces of the upper substrate 1 and the lower substrate 2 is flush with the side wall 43 in the width direction on the side near the side surfaces of the upper substrate 1 and the lower substrate 2 of the detection unit 4. Connected to
The side wall 33 on the side far from the side surface 11 of the upper substrate 1 and the lower substrate 2 is connected perpendicularly to the side wall 41 in the length direction of the detection unit 4. A sample injection port 31 is formed on the opposite side (upstream side) of the fine channel 3.

試料排出用微細流路5は断面形状は、幅300μm、深さ100μmの長方形であり、
その側壁は上部基板1の上面及び下部基板2下面と垂直であり、且つ、上部基板1及び下
部基板2の他側面12と平行であって、他側面12と他側面に近い側壁52の間隔が1m
mになるように形成されている。
The sample discharge microchannel 5 has a cross-sectional shape of a rectangle having a width of 300 μm and a depth of 100 μm,
The side wall is perpendicular to the upper surface of the upper substrate 1 and the lower surface of the lower substrate 2, and is parallel to the other side surface 12 of the upper substrate 1 and the lower substrate 2, and the distance between the other side surface 12 and the side wall 52 close to the other side surface. 1m
m.

試料排出用微細流路5は、上部基板1及び下部基板2の他側面12に近い側の側壁52
が、検出部4の上部基板1及び下部基板2の他側面に近い側の幅方向の側壁44(検出部
4の下流側の側壁)と面一なるように接続され、上部基板1及び下部基板2の他側面12
に遠い側の側壁53は、検出部4の長さ方向の側壁41に垂直に接続されている。又、試
料排出用微細流路5の反対側(下流側)には試料排出口51が穿設されている。
The sample discharge microchannel 5 has a side wall 52 on the side close to the other side surface 12 of the upper substrate 1 and the lower substrate 2.
Are connected so as to be flush with the side wall 44 in the width direction on the side close to the other side surfaces of the upper substrate 1 and the lower substrate 2 of the detection unit 4 (the side wall on the downstream side of the detection unit 4). 2 on the other side 12
The side wall 53 on the far side is connected vertically to the side wall 41 in the length direction of the detection unit 4. A sample discharge port 51 is formed on the opposite side (downstream side) of the sample discharge fine channel 5.

図中6及び61は、検出部4の両側に形成された空隙部であり、平面形状は長方形であ
り、断面形状は幅600μm、深さ100μmの長方形である。空隙部6及び61の検出
部4に近い面62、63は、検出部4の側壁に平行な平面であり、検出部4の側壁との間
隔は20μmである。
In the figure, reference numerals 6 and 61 denote voids formed on both sides of the detection unit 4, the planar shape is a rectangle, and the cross-sectional shape is a rectangle having a width of 600 μm and a depth of 100 μm. The surfaces 62 and 63 close to the detection unit 4 of the gaps 6 and 61 are planes parallel to the side wall of the detection unit 4, and the distance from the side wall of the detection unit 4 is 20 μm.

入射された光線Dは検出部4内を横切って通過し、検出部4の長さ方向の側壁42から
出光し、空隙部6の検出部4に近い面62で反射され、再び長さ方向の側壁42から検出
部4に入射される。
The incident light beam D passes through the detection unit 4, exits from the side wall 42 in the length direction of the detection unit 4, is reflected by the surface 62 near the detection unit 4 of the gap portion 6, and again in the length direction. The light enters the detection unit 4 from the side wall 42.

入射された光線Dは検出部4内を横切って通過し、検出部4の反対側の長さ方向の側壁
41から出光し、反対側の空隙部61の検出部4に近い面63で反射され、長さ方向の側
壁41から検出部4に入射される。
The incident light beam D passes through the detection unit 4, exits from the side wall 41 in the length direction on the opposite side of the detection unit 4, and is reflected by the surface 63 near the detection unit 4 of the gap 61 on the opposite side. The light enters the detection unit 4 from the side wall 41 in the length direction.

光線Dは、上記入射、出光、反射を繰り返し、検出部4の幅方向の側壁44に到達し、
基板の他側面12から出光するので、この出光した光線Dを光学測定装置で受光して測定
する。
The light beam D repeats the incidence, light emission, and reflection, and reaches the side wall 44 in the width direction of the detection unit 4.
Since light is emitted from the other side surface 12 of the substrate, the emitted light beam D is received by an optical measuring device and measured.

尚、入射された光線Dは、検出部4を複数回横切るので光線を検出部4に対し平行に入
射した場合よりも長い距離試料に照射された状態になり、感度よく検出することができる
In addition, since the incident light beam D traverses the detection unit 4 a plurality of times, it becomes a state in which the sample is irradiated to a longer distance than when the light beam is incident on the detection unit 4 in parallel, and can be detected with high sensitivity.

請求項1記載の光学測定用マイクロリアクターの構成は上述の通りであるから、非常に
小型でありながら、検出部に入射された光線は複数回検出部を複数回横切るので、検出す
る距離が実際の検出部よりも長くなり、濃度の薄い微量物質を感度よく検出することがで
きる。
Since the configuration of the microreactor for optical measurement according to claim 1 is as described above, since the light incident on the detection unit traverses the detection unit a plurality of times even though it is very small, the distance to be detected is actually Therefore, it is possible to detect a trace substance with a low concentration with high sensitivity.

請求項9記載の光学測定方法の構成は上述の通りであるから、簡便に且つ濃度の薄い微
量物質を感度よく測定することができる。
Since the configuration of the optical measurement method according to the ninth aspect is as described above, it is possible to easily measure a trace substance having a low concentration with high sensitivity.

次に本発明の実施例を説明するが、本発明は下記実施例に限定されるものではない。   Next, examples of the present invention will be described, but the present invention is not limited to the following examples.

(実施例1)
図1に示した光学測定用マイクロリアクターの試料注入口51から0.01g/mlロ
イヤルブラック水溶液を注入し、ロイヤルブラック水溶液で微細流路3、検出部4及び試
料排出用微細流路5で充満した。
(Example 1)
A 0.01 g / ml royal black aqueous solution is injected from the sample inlet 51 of the microreactor for optical measurement shown in FIG. 1 and is filled with the fine flow channel 3, the detection unit 4, and the sample discharge fine flow channel 5 with the royal black aqueous solution. did.

ハロゲンータングステンランプ光源(オーシャンオプティクス社製、商品名「LS−1
」)から光線を基板1の側面11に対し45度の角度で照射し、検出部4から出光した波
長500nmの光線を吸光光度計(オーシャンオプティクス社製、商品名「USB200
」)で受光して吸光度を測定したところ1.5Absであった。
Halogen-tungsten lamp light source (manufactured by Ocean Optics, trade name “LS-1”
)) To the side surface 11 of the substrate 1 at an angle of 45 degrees, and the light having a wavelength of 500 nm emitted from the detection unit 4 is absorbed by an absorptiometer (trade name “USB200, manufactured by Ocean Optics Co., Ltd.).
]) And the absorbance was measured and found to be 1.5 Abs.

(比較例1)
図1に示した光学測定用マイクロリアクターに、試料注入口51から0.01g/ml
ロイヤルブラック水溶液を注入し、ロイヤルブラック溶液で微細流路3、検出部4及び試
料排出用微細流路5で充満した。
(Comparative Example 1)
0.01 g / ml from the sample inlet 51 to the optical measurement microreactor shown in FIG.
A royal black aqueous solution was injected, and the royal black solution was filled with the fine flow path 3, the detection unit 4, and the sample discharge fine flow path 5.

基板1の側面11から検出部4に対し平行に、ハロゲンータングステンランプ光源(オ
ーシャンオプティクス社製、商品名「LS−1」)から光線を照射し、検出部4から出光
した 波長500nmの光線を吸光光度計(オーシャンオプティクス社製、商品名「US
B200」)で受光して吸光度を測定したところ0.2Absであった。
A light beam having a wavelength of 500 nm emitted from the detection unit 4 is emitted from the side surface 11 of the substrate 1 in parallel to the detection unit 4 from a halogen-tungsten lamp light source (trade name “LS-1”, manufactured by Ocean Optics). Absorptiometer (Ocean Optics, trade name “US
B200 ") and the absorbance was measured and found to be 0.2 Abs.

本発明の光学測定用マイクロリアクターの一例を示す平面図である。It is a top view which shows an example of the microreactor for optical measurement of this invention. 図1におけるA−A断面図である。It is AA sectional drawing in FIG. 図1におけるBの拡大図であって、光線の透過状況を示している。FIG. 2 is an enlarged view of B in FIG. 1 and shows a light transmission state.

符号の説明Explanation of symbols

1 上部基板
2 下部基板
3 微細流路
4 検出部
5 試料排出用微細流路
6、61 空隙部
DESCRIPTION OF SYMBOLS 1 Upper board | substrate 2 Lower board | substrate 3 Fine flow path 4 Detection part 5 Fine flow path for sample discharge 6, 61 Cavity part

Claims (11)

複数枚の基板が積層され、基板の間に検出物質を含有する試料を注入する微細流路と、該微細流路に接続された検出部が形成されているマイクロリアクターであって、該検出部は前記基板の1側面近傍から他側面近傍までの長さを有し、検出部の両側に空隙部が形成されており、前記基板の1側面から入射された光線は空隙部の側面で反射され、検出部を複数回横切った後、前記基板の他側面から出光するようになされていることを特徴とする光学測定用マイクロリアクター。   A microreactor in which a plurality of substrates are stacked, a microchannel for injecting a sample containing a detection substance between the substrates, and a detection unit connected to the microchannel, wherein the detection unit Has a length from the vicinity of one side surface of the substrate to the vicinity of the other side surface, and gaps are formed on both sides of the detection unit. Light incident from one side of the substrate is reflected by the side surfaces of the gaps. A microreactor for optical measurement, wherein light is emitted from the other side of the substrate after traversing the detection section a plurality of times. 検出部の平面形状は略長方形であることを特徴とする請求項1記載の光学測定用マイク
ロリアクター。
2. The microreactor for optical measurement according to claim 1, wherein the planar shape of the detection unit is substantially rectangular.
検出部の対向する側壁は、互いに平行な平面であり、且つ、基板の上面及び下面に垂直
な平面であることを特徴とする請求項2記載の光学測定用マイクロリアクター。
The microreactor for optical measurement according to claim 2, wherein the opposing side walls of the detection unit are planes parallel to each other and are planes perpendicular to the upper surface and the lower surface of the substrate.
微細流路内の試料の流れ方向と、検出部内の試料の流れ方向が略垂直になるように、微
細流路が検出部に接続されていることを特徴とする請求項3記載の光学測定用マイクロリ
アクター。
4. The optical measurement device according to claim 3, wherein the micro flow channel is connected to the detection unit so that the flow direction of the sample in the micro flow channel and the flow direction of the sample in the detection unit are substantially perpendicular to each other. Microreactor.
複数枚の基板の間に試料排出用微細流路が形成されており、該試料排出用微細流路は、試料排出用微細流路内の試料の流れ方向と、検出部内の試料の流れ方向が略垂直になるように、検出部に接続されていることを特徴とする請求項3又は4記載の光学測定用マイクロリアクター。   A sample discharge microchannel is formed between a plurality of substrates, and the sample discharge microchannel has a flow direction of the sample in the sample discharge microchannel and a flow direction of the sample in the detection unit. 5. The microreactor for optical measurement according to claim 3, wherein the microreactor for optical measurement is connected to the detection unit so as to be substantially vertical. 空隙部の検出部に近い面は、検出部の側壁に平行な平面であることを特徴とする請求項
3〜5のいずれか1項記載の光学測定用マイクロリアクター。
The microreactor for optical measurement according to any one of claims 3 to 5, wherein the surface of the gap portion close to the detection portion is a plane parallel to the side wall of the detection portion.
検出部の幅と、検出部の側壁と空隙部の検出部に近い面との幅の比が1.1以上である
ことを特徴とする請求項3〜6のいずれか1項記載の光学測定用マイクロリアクター。
The optical measurement according to any one of claims 3 to 6, wherein the ratio of the width of the detection unit to the width of the side wall of the detection unit and the width of the gap near the detection unit is 1.1 or more. Microreactor.
基板の屈折率が1.05〜2.50であることを特徴とする請求項1〜7のいずれか1
項記載の光学測定用マイクロリアクター。
The refractive index of the substrate is 1.05 to 2.50.
The microreactor for optical measurement according to item.
請求項1〜8のいずれか1項記載の光学測定用マイクロリアクターの微細通路から、検
出物質を含有する試料を検出部に注入し、基板の1側面から光線を入射し、空隙部の側面
で反射され、検出部を複数回横切った後、基板の他側面から出光した光線を光学測定装置
で受光して検出物質を測定することを特徴とする光学測定方法。
A sample containing a detection substance is injected into the detection section from the micro passage of the optical measurement microreactor according to any one of claims 1 to 8, and a light beam is incident from one side surface of the substrate. An optical measurement method comprising: measuring a detected substance by receiving a light beam reflected from the other side surface of the substrate after being reflected a plurality of times and then receiving a light beam from an optical measurement device.
光線が検出部を横切る総距離が、検出部の長さの1.1倍以上になるように、光線を入
射することを特徴とする請求項9記載の光学測定方法。
The optical measurement method according to claim 9, wherein the light beam is incident so that a total distance of the light beam across the detection unit is 1.1 times or more of a length of the detection unit.
検出部の温度を一定に制御して測定することを特徴とする請求項9又は10記載の光学
測定方法。
The optical measurement method according to claim 9 or 10, wherein the temperature of the detection unit is controlled to be constant and measurement is performed.
JP2003325164A 2003-09-17 2003-09-17 Microreactor for optical measurement and optical measurement method using the same Expired - Fee Related JP4371745B2 (en)

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