JP4198683B2 - メソポーラス白金電極及びそれを使用した生化学的基質の検出方法 - Google Patents
メソポーラス白金電極及びそれを使用した生化学的基質の検出方法 Download PDFInfo
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title claims description 177
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G01—MEASURING; TESTING
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- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/327—Biochemical electrodes, e.g. electrical or mechanical details for in vitro measurements
- G01N27/3271—Amperometric enzyme electrodes for analytes in body fluids, e.g. glucose in blood
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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Description
(a)発明の分野
本発明は、メソポーラス白金電極及びそれを使用した生化学的基質の検出方法に関するものであり、より詳細には、メソポーラス白金層が表面に形成された電極を含むメソポーラス白金電極及び前記メソポーラス白金電極を使用してグルコース酸化反応への選択的な応答を検出することによる、グルコース濃度の測定方法に関するものである。
バイオセンサーは、電子機器と組み合わせて、生物学的試料の化学的情報を簡単に処理可能な電気的信号に変換する。バイオセンサーは、複雑な化学的、生物学的前処理をする必要なしに検体の定量的情報をリアルタイムで選択的にモニタリングできるという長所のため、医学分野で広く開発され、応用されている。
従来技術の問題点を解決するために、本発明は非酵素的であり、重金属を用いないグルコースの検出方法を提供することを目的とする。
図1はグルコース、アスコルビン酸及びアセトアミドフェノンをそれぞれメソポーラス白金電極と接触させた時に発生した応答電流の強さを示すものであり、そして
図2はメソポーラス白金電極におけるグルコース濃度に対して発生した電流を示す検量線である。
本発明は、非酵素性バイオセンサーを使用して生化学的基質を検出する方法に関するもので、より詳細には、メソポーラス白金電極によりグルコースの酸化をモニターして、グルコースの濃度を定量する方法に関するものである。生化学的基質の例として、グルコース、他の糖類(ガラクトース、フルクトース、ラクトース、マルトース、スクロース等)、電気化学的活性タンパク質(ヘミン、Cu(II)、FeS、フラビンモノヌクレオチド、フラビンアデニンジヌクレオチド及びジスルファイドのような酸化還元活性基を有する物質)、そしてアミノ酸(チロシン(Tyr)及びトリプトファン(Trp)等)を挙げることができる。
C16EO8(0.42g)、蒸留水(0.29g)及び水素ヘキサクロロ白金水和物(0.29g)を混合して、混合物が透明になり均質化されるまで温度を80℃に上昇させた。白金電極を均質混合物に挿入し、温度を常温(約23〜26℃)に下げた。この工程で、前記混合物は高い粘性を持った液晶相になった。白金蒸着は、一定の電位(Ag/AgClに対して−0.06V)で、研磨された白金棒電極の表面で実施された。得られたメソポーラス白金電極を蒸留水に1時間おいて、C16EO8を抽出した。前記抽出を3〜4回反復して実施した後、再生可能な方法で同一のサイクリックボルタモグラムが得られるまで、0.5N硫酸溶液でAg/AgClに対する+1乃至0.45Vの循環電位を使用して、電気化学的洗浄を行った。
粗さ因子72での比表面積は37m2/g、これから電気メッキ過程でのファラデー効率は約30%、厚さ300nmのフイルムの1mm2面積で、20±5nmと報告された、優秀な平坦度に帰する鏡のような表面
孔と孔の間隔6.1nmに相応する1.68Å(2θ)の単一X線回折ピーク
よく研磨された白金(Pt−s)表面と同一な拡散性。
メソポーラス白金電極をグルコース、アスコルビン酸及び、アセトアミドフェノールが各々添加されたリン酸緩衝食塩水(0.1Mリン酸塩、0.15M NaCl、pH7.4、37.2±0.2℃)に浸漬して、Ag/AgClに対して0.4Vで電流を測定した。同一な測定を研磨された平滑な表面を有する白金をコントロールとして使用して行った。
b:0.1mMに対するシグナル(μAcm−2)
図2及び表1で、メソポーラス白金電極は0乃至10mMのグルコース濃度範囲で9.6μAcm−2mM−1の感度を示し、平滑な表面を有する白金電極は0.039μAcm−2mM−1の感度を示す。即ち、メソポーラス白金電極は、平滑な表面を有する白金電極に比べてグルコース感度が約250倍高い。サンプル内グルコース濃度は図2の検量線を使用して計算できる。
Claims (3)
- メソポーラス白金層が表面を被覆してなる電極を含む、グルコースを検出するための酵素によって修飾されていないメソポーラス白金電極。
- 前記電極が、貴金属または酸耐性金属である、請求項1に記載のメソポーラス白金電極。
- メソポーラス白金層が表面を被覆してなる電極を含む酵素によって修飾されていないメソポーラス白金電極を得る工程と、
グルコースを含むと予想されるサンプル溶液を前記メソポーラス白金電極と接触させる工程と、
前記メソポーラス白金電極に電圧を印加して発生した応答電流を検出する工程を含む、グルコースの検出方法。
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KR10-2002-0057740A KR100481663B1 (ko) | 2002-09-24 | 2002-09-24 | 중기공성 백금을 포함하는 바이오센서 및 이를 이용한글루코스 농도 측정방법 |
PCT/KR2003/000884 WO2004029611A1 (en) | 2002-09-24 | 2003-05-02 | Mesoporous platinum electrode and method for detecting biochemical substrate using the mesoporous platinum electrode |
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KR100846456B1 (ko) * | 2004-12-23 | 2008-07-16 | 재단법인서울대학교산학협력재단 | 메조포러스 산화금속전극 및 이의 용도 |
WO2006068444A1 (en) | 2004-12-23 | 2006-06-29 | Seoul National University Industry Foundation | Fabrication of mesoporous metal electrodes in non-liquid-crystalline phase and its application |
CA2873141C (en) | 2009-12-30 | 2018-05-29 | Adam Kelliher | Simulated moving bed chromatographic separation process |
GB201111601D0 (en) | 2011-07-06 | 2011-08-24 | Equateq Ltd | New process |
GB201111591D0 (en) | 2011-07-06 | 2011-08-24 | Equateq Ltd | Further new process |
GB201111594D0 (en) | 2011-07-06 | 2011-08-24 | Equateq Ltd | New improved process |
GB201111595D0 (en) | 2011-07-06 | 2011-08-24 | Equateq Ltd | Improved process |
GB201111589D0 (en) | 2011-07-06 | 2011-08-24 | Equateq Ltd | New modified process |
EP2581737B1 (en) | 2011-10-14 | 2014-11-26 | Samsung Electronics Co., Ltd | System for measuring oxidation-reduction potential, using porous platinum electrodes |
WO2014014176A1 (ko) * | 2012-07-16 | 2014-01-23 | 서울대학교산학협력단 | 무구획 무효소 수크로스-공기 연료전지 |
GB201300354D0 (en) | 2013-01-09 | 2013-02-20 | Basf Pharma Callanish Ltd | Multi-step separation process |
US8802880B1 (en) | 2013-05-07 | 2014-08-12 | Group Novasep | Chromatographic process for the production of highly purified polyunsaturated fatty acids |
US9428711B2 (en) | 2013-05-07 | 2016-08-30 | Groupe Novasep | Chromatographic process for the production of highly purified polyunsaturated fatty acids |
EP2883860B1 (fr) | 2013-12-11 | 2016-08-24 | Novasep Process | Procédé chromatographique de production d'acides gras polyinsaturés |
US10975031B2 (en) | 2014-01-07 | 2021-04-13 | Novasep Process | Method for purifying aromatic amino acids |
KR102044061B1 (ko) | 2016-12-21 | 2019-11-12 | 주식회사 유엑스엔 | 연속 혈당 측정장치, 상기 장치를 포함한 연속 혈당 측정시스템 및 연속 혈당 측정방법 |
US10330628B2 (en) | 2017-11-21 | 2019-06-25 | Uxn Co., Ltd. | Glucose-sensing electrode and device with nanoporous layer |
KR102078776B1 (ko) * | 2017-12-04 | 2020-02-19 | 주식회사 포스코 | 말토오스 불투과층을 포함하는 바이오 센서 및 이의 제조방법 |
KR20250009590A (ko) * | 2017-12-15 | 2025-01-17 | 주식회사 유엑스엔 | 나노다공성 구조를 포함하는 콜로이드와 무효소 글루코스 센싱장치 및 시스템 |
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