Electrochemical determination of vitamin C in the presence of uric acid by a novel TiO2 nanoparticles modified carbon paste electrode

被引：32

作者：

Mazloum-Ardakani, Mohammad ^{[1
]}

Sheikh-Mohseni, Mohammad Ali ^{[1
]}

Beitollahi, Hadi ^{[1
]}

Benvidi, Ali ^{[1
]}

Naeimi, Hossein ^{[2
]}

机构：

[1] Yazd Univ, Fac Sci, Dept Chem, Yazd 89195741, Iran

[2] Univ Kashan, Fac Chem, Dept Organ Chem, Kashan, Iran

来源：

CHINESE CHEMICAL LETTERS | 2010年 / 21卷 / 12期

关键词：

Ascorbic acid; Uric acid; TiO2; nanoparticles; Electrocatalysis; Modified carbon paste electrode; ASCORBIC-ACID; ELECTROCATALYTIC DETERMINATION; SENSOR;

D O I：

10.1016/j.cclet.2010.07.026

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The electrochemical behavior of vitamin C (ascorbic acid or AA) is investigated on the surface of a carbon-paste electrode modified with TiO2 nanoparticles and 2,2'-(1,2 butanediylbis(nitriloethylidyne))-bis-hydroquinone (BBNBH). The prepared modified electrode showed an efficient catalytic role in the electrochemical oxidation of AA, leading to remarkable decrease in oxidation overpotential and enhancement of the kinetics of the electrode reaction. This modified electrode exhibits well-separated oxidation peaks for AA and uric acid (UA). The modified electrode is successfully applied for the accurate determination of AA in pharmaceutical preparations. (C) 2010 Mohammad Mazloum-Ardakani. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

引用

页码：1471 / 1474

页数：4

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