Influence of EDTA on the electrochemical behavior of phenols

被引：37

作者：

de Carvalho, RM ^{[1
]}

Kubota, LT ^{[1
]}

Rath, S ^{[1
]}

机构：

[1] UNICAMP, Inst Chem, BR-13083970 Campinas, SP, Brazil

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2003年 / 548卷

基金：

巴西圣保罗研究基金会;

关键词：

phenol; EDTA; inhibition of electrode passivation; electrochemical behavior;

D O I：

10.1016/S0022-0728(03)00193-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Electrochemical oxidation of phenolic compounds leads to a deposition of polymeric films on the surfaces of Pt, glassy carbon, pyrolytic graphite and carbon fiber electrodes, decreasing the electrode activity (passivation). Addition of EDTA to the medium produces a significant enhancement in the electrochemical behavior of phenolic compounds, avoiding electrode passivation. An improvement in the selectivity and sensitivity for the quantitative voltammetric determination of dopamine, catechol and 4-aminophenol was also verified. The electroactivity of the electrode was maintained even after long periods of use in the presence of EDTA. The effect of the EDTA concentration on the electrochemical behavior of some phenolic compounds is reported. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：19 / 26

页数：8

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