The effects of concentration and solution pH on the kinetic parameters for the electrocatalytic oxidation of dihydronicotiamide adenine dinucleotide (NADH) at glassy carbon electrode modified with electropolymerized film of toluidine blue o

被引：23

作者：

Cai, CX ^{[1
]}

Xue, KH ^{[1
]}

机构：

[1] Nanjing Normal Univ, Dept Chem, Nanjing 210097, Peoples R China

来源：

MICROCHEMICAL JOURNAL | 2000年 / 64卷 / 02期

关键词：

electrocatalysis; chemically modified electrode; mediator; NADH; toluidine blue o;

D O I：

10.1016/S0026-265X(99)00016-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The kinetic parameters for electrocatalytic oxidation of dihydronicotiamide adenine dinucleotide (NADH) at poly(toluidine blue o) (PTOB) modified glassy carbon electrode have been determined using rotating disk electrode measurements. The rate constant for the chemical reaction between NADH and PTOB was strongly influenced by NADH concentration and solution pH, and it decreased with increasing NADH concentration. It is indicated that the electrocatalytic process proceeded via the formation of an intermediate charge-transfer complex between NADH and PTOB. The presence of Mg2+ and Ca2+ in an electrolyte can greatly enhance the electrocatalytic current for NADH oxidation. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：131 / 139

页数：9

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