Poly(pyrrole) versus poly(3,4-ethylenedioxythiophene): amperometric cholesterol biosensor matrices

被引：17

作者：

Tuerkarslan, Oezlem ^{[1
]}

Kayahan, Senem Kiralp ^{[1
]}

Toppare, Levent ^{[1
]}

机构：

[1] Middle E Tech Univ, Dept Chem, TR-06531 Ankara, Turkey

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2009年 / 13卷 / 05期

关键词：

Amperometric biosensor; Enzyme electrodes; Conducting polymers; Cholesterol; Cholesterol oxidase; SELF-ASSEMBLED MONOLAYER; POLY 3,4-ETHYLENEDIOXYTHIOPHENE; OXIDASE; SURFACE; FILM; POLYPYRROLE; ELECTROPOLYMERIZATION; IMMOBILIZATION; ELECTRODE; ESTERASE;

D O I：

10.1007/s10008-008-0590-7

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Two conducting polymers, poly(pyrrole) (PPy) and poly(3,4-ethylenedioxythiophene) (PEDOT) were used as immobilization matrices for cholesterol oxidase (ChOx). The amperometric responses of the enzyme electrodes were measured by monitoring oxidation current of H2O2 at +0.7 V in the absence of a mediator. Kinetic parameters, such as K (m) and I (max), operational and storage stabilities, effects of pH and temperature were determined for both entrapment supports. K (m) values are found as 7.9 and 1.3 mM for PPy and PEDOT enzyme electrodes, respectively; it can be interpreted that ChOx immobilized in PEDOT shows higher affinity towards the substrate.

引用

页码：657 / 663

页数：7

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