A New Chromium(III) Microelectrode Based on Self-Assembled Diethylenetriamminepentaacetic Acid-Poly(fuchsin basic) Modified Electrode

被引：4

作者：

Li, Jianping ^{[1
]}

Le, Shangwang ^{[1
]}

Li, Qiuyan ^{[1
]}

Zhang, Xuehong ^{[1
]}

机构：

[1] Guilin Univ Technol, Dept Chem & Mat Engn, Guilin 541004, Peoples R China

来源：

ELECTROANALYSIS | 2009年 / 21卷 / 07期

基金：

芬兰科学院; 美国国家科学基金会;

关键词：

Ion selective microelectrodes; Chromium(III); Diethylenetriamminepentaacetic acid; All solid-state; Fuchsin basic; ION-SELECTIVE ELECTRODES; NEUTRAL CARRIER; PVC MATRIX; CR(III); CR(VI); SENSOR; PRECONCENTRATION; COEFFICIENTS; IONOPHORES; SORBENT;

D O I：

10.1002/elan.200804481

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new selective, sensitive, and rapid response microelectrode for microamount chromium(III) determination was developed. For the electrode preparation, fuchsin basic was electropolymerized onto a carbon microdisk electrode., and then diethylenetriamminepentaacetic acid (DTPA) was self-assembled oil the electrode surface by the reaction between DTPA and poly(fuchsin basic). The determination conditions were optimized. The electrode showed a linear response to Cr3+ ions in the concentration range of 1.0 x 10(-6) - 1.0 x 10(-4) M and exhibits a super-Nernstian slope of 32.5 +/- 0.4 mV per decade. The detection limit is 3.6 x 10(-7) M. The response time of the electrode is less than 10 s, and it can be used for at least 2 months with limited considerable divergences in its potentials. The proposed electrode was applied for monitoring the chromium ion level in wastewater of chromate industries.

引用

页码：831 / 836

页数：6

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