Simultaneous determination of ascorbic acid and dopamine at a sol-gel composite electrode

被引：101

作者：

Shankaran, DR ^{[1
]}

Iimura, K ^{[1
]}

Kato, T ^{[1
]}

机构：

[1] Utsunomiya Univ, Satellite Venture Business Lab, Utsunomiya, Tochigi 3218585, Japan

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2003年 / 94卷 / 01期

关键词：

sol-gel composite electrode; (3-mercaptopropyl)trimethoxysilane; copper; ascorbic acid; dopamine; electrocatalysis;

D O I：

10.1016/S0925-4005(03)00327-7

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new sol-gel composite electrode containing dispersed copper was fabricated using (3-mercaptopropyl)trimethoxy si lane (MPS) and copper nitrate. The sensor exhibited excellent characteristics for simultaneous determination of ascorbic acid and dopamine owing to its combined features of sol-gel composite and copper catalysis. The peaks for the oxidation of ascorbic acid and dopamine were well resolved at the reduced potentials with good sensitivity. A linear response to ascorbic acid and dopamine was observed in the concentration range from 1.6 x 10(-5) to 5.0 x 10(-3) M and 7.3 x 10(-6) to 2.2 x 10(-3) M with a correlation coefficient of 0.9987 and 0.9979, respectively. The proposed sensor has promising features such as, ease of fabrication, good reproducibility, high stability and the easy surface renewal by simple polishing. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：73 / 80

页数：8

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