Determination of Chromium(VI) in Electronics Materials Using Trioctylamine Modified Carbon Paste Electrode

被引：6
|
作者：
Xu, Juan [1 ,2 ]
Kong, Yong [1 ]
Wang, Wenchang [1 ]
Chen, Zhidong [1 ]
Yao, Shiping [3 ]
机构：
[1] Jiangsu Polytech Univ, Qualtec Co Ltd, Changzhou 213164, Peoples R China
[2] Jiangsu Fine Petr Chem Key Labs, Changzhou 213164, Peoples R China
[3] ChemChina Petr Dev Corp, Beijing 100080, Peoples R China
来源：
ANALYTICAL SCIENCES | 2009年 / 25卷 / 12期
基金：
美国国家科学基金会;
关键词：
HEXAVALENT CHROMIUM; STRIPPING VOLTAMMETRY; CR(VI); REDUCTION; ELECTROCOAGULATION; EXTRACTION; SEPARATION; SPECIATION; REMOVAL; IONS;
D O I：
10.2116/analsci.25.1427
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A trioctylamine (TOA) modified carbon paste electrode (TOA/CPE) was firstly utilized to determine Cr(VI) in electronics materials. The effects of preconcentration conditions, that is, TOA amount and accumulation time on Cr(VI) accumulation were examined and the optimum experiment conditions for the determination were identified. A sensitive reduction peak in the stripping voltammogram at 0.45 V, a characteristic of trace Cr(VI), was detected when the accumulation time was 10 min. Under optimized conditions, TOA/CPE demonstrated an enhanced sensitivity for Cr(VI), providing a low detection limit (S/N = 3) at 3.4 x 10(-9) M. Interference studies also displayed high selectivity of the TOA/CPE for Cr(VI); this electrode can accurately determine Cr(VI) in the presence of Cr(III) (600-fold concentration) and other interfering cations.
引用
收藏
页码：1427 / 1430
页数：4
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