Determination of dopamine in the presence of ascorbic acid by poly(styrene. sulfonic acid) sodium salt/single-wall carbon nanotube film modified glassy carbon electrode

被引：122

作者：

Zhang, YZ ^{[1
]}

Cai, YJ ^{[1
]}

Su, S ^{[1
]}

机构：

[1] Anhui Normal Univ, Coll Chem & Mat Sci, Anhui Key Lab Funct Mol Solids, Wuhu 241000, Peoples R China

来源：

ANALYTICAL BIOCHEMISTRY | 2006年 / 350卷 / 02期

关键词：

single-wall carbon nanotube; poly(styrene sulfonic acid) sodium salt; dopamine; ascorbic acid;

D O I：

10.1016/j.ab.2006.01.002

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

In this study, poly(styrene sulfonic acid) sodium salt/single-wall carbon nanotube film was cast onto the surface of glassy carbon electrode and the electrochemical behavior of the modified electrode was investigated. The results show that the anodic peak current is proportional to the concentration of dopamine in the range of 1.6 x 10(-8)-6 x 10(-4) M. The detection limit is 8 x 10(-9) M. The interference of ascorbic acid with the determination of dopamine Could be eliminated due to the very distinct attracting interaction between dopamine cations and the negative poly(styrene sulfonic acid) sodium salt film in pH 7.0 phosphate-buffered saline solutions. The proposed method exhibits good sensitivity, selectivity, and reproducibility. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：285 / 291

页数：7

共 53 条

[1] PROBING BRAIN CHEMISTRY WITH ELECTROANALYTICAL TECHNIQUES [J].