Electrochemical Oxidation of Cysteine at a Film Gold Modified Carbon Fiber Microelectrode Its Application in a Flow-Through Voltammetric Sensor

被引：30

作者：

Wang, Lai-Hao ^{[1
]}

Huang, Wen-Shiuan ^{[1
]}

机构：

[1] Chia Nan Univ Pharm & Sci, Dept Med Chem, Tainan 71743, Taiwan

来源：

SENSORS | 2012年 / 12卷 / 03期

关键词：

micro Au-modified carbon fiber electrode; pulse amperometric detection; cysteine; DUAL-ELECTRODE DETECTION; ACETYL-L-CYSTEINE; LIQUID-CHROMATOGRAPHY; AMINO-ACIDS; BIOSENSOR; SAMPLES; SYSTEM;

D O I：

10.3390/s120303562

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A flow-electrolytical cell containing a strand of micro Au modified carbon fiber electrodes (CFE) has been designedand characterized for use in a voltammatric detector for detecting cysteine using high-performance liquid chromatography. Cysteine is more efficiently electrochemical oxidized on a Au /CFE than a bare gold and carbon fiber electrode. The possible reaction mechanism of the oxidation process is described from the relations to scan rate, peak potentials and currents. For the pulse mode, and measurements with suitable experimental parameters, a linear concentration from 0.5 to 5.0 mg.L-1 was found. The limit of quantification for cysteine was below 60 ng.mL(-1).

引用

页码：3562 / 3577

页数：16

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