Electroanalysis and simultaneous determination of dopamine and epinephrine at poly(isonicotinic acid)-modified carbon paste electrode in the presence of ascorbic acid

被引：33
|
作者：
Zhou, Yuan Zhen [1 ]
Zhang, Li Juan [1 ]
Chen, Shuang Li [1 ]
Dong, She Ying [1 ]
Zheng, Xiao Hui [2 ]
机构：
[1] Xian Univ Architecture & Technol, Sch Sci, Xian 710055, Peoples R China
[2] NW Univ Xian, Res & Engn Ctr Modernizat Chinese Herbal Med, Xian 710069, Peoples R China
来源：
CHINESE CHEMICAL LETTERS | 2009年 / 20卷 / 02期
基金：
芬兰科学院;
关键词：
Dopamine; Epinephrine; Isonicotinic acid; Ascorbic acid; Simultaneous determination; CHEMICALLY MODIFIED ELECTRODES;
D O I：
10.1016/j.cclet.2008.10.026
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A carbon paste electrode modified with electropolymerized films of isonicotinic acid was developed. The modified electrode shows excellent electrocatalytic activity toward the oxidation of both dopamine (DA) and epinephrine (EP). Separation of the reduction peak potentials for dopamine and epinephrine was about 357 mV in pH 5.3 phosphate buffer solution (PBS) and the character was used for the detection DA and EP simultaneously. The peak currents increase linearly with DA and EP concentration over the range of 8.0 x 10(-5) to 7.0 x 10(-4) mol/L and 5.0 x 10(-6) to 1.0 x 10(-4) mol/L with detection limits of 2 x 10(-5) and 1 x 10(-6) mol/L, respectively. The interference studies showed that the modified electrode exhibits excellent selectivity in the presence of large excess of ascorbic acid (AA). (C) 2008 Yuan Zhen Zhou. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
引用
收藏
页码：217 / 220
页数：4
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