Determination of dopamine in the presence of ascorbic acid using poly (acridine red) modified glassy carbon electrode

被引：57

作者：

Zhang, YZ ^{[1
]}

Jin, GY ^{[1
]}

Wang, YL ^{[1
]}

Yang, ZS ^{[1
]}

机构：

[1] Anhui Normal Univ, Sch Chem & Mat Sci, Wuhu 241000, Peoples R China

来源：

SENSORS | 2003年 / 3卷 / 10期

关键词：

glassy carbon electrode; chemically modified electrode; dopamine; ascorbic acid; acridine red;

D O I：

10.3390/s31000443

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Poly ( acridine red) modified glassy carbon electrode was used for the detection of dopamine in the presence of ascorbic acid in a pH 7.4 phosphate buffer solutions (PBS) by cyclic voltammetry and differential pulse voltammetry. The major difficulty of the overlapped oxidation potential of ascorbic acid could be overcome through the distinct attractive ability of poly ( acridine red) film to cationic dopamine and anionic ascorbic acid. The results showed that the dopamine anodic peak current and the concentration of dopamine had a linear relationship in the range of 1.0 x 10(-7) similar to 1.0 x 10(-4) mol dm(-3). The detection limit (S/N= 3) obtained by differential pulse voltammetry was 1.0 x 10(-9) mol dm(-3). The relative standard deviation of 10 successive scans was 2.07 % for 1.0 x 10(-6) mol dm(-3) DA. Ascorbic acid had hardly interference with the determination of dopamine. The proposed method exhibits good recovery and reproducibility.

引用

页码：443 / 450

页数：8

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