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

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...

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Veröffentlicht in:	Analytical Sciences 2009/12/10, Vol.25(12), pp.1427-1430
Hauptverfasser:	XU, Juan, KONG, Yong, WANG, Wenchang, CHEN, Zhidong, YAO, Shiping
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Sprache:	eng
Schlagworte:	Amines - chemistry Analytic Sample Preparation Methods Analytical Chemistry Calibration Carbon - chemistry Chemistry Chromium - analysis Chromium - chemistry Electrical Equipment and Supplies Electrodes Environmental Pollutants - analysis Environmental Pollutants - chemistry Limit of Detection Reproducibility of Results
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creator	XU, Juan KONG, Yong WANG, Wenchang CHEN, Zhidong YAO, Shiping
description	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 × 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.
doi_str_mv	10.2116/analsci.25.1427
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subjects	Amines - chemistry Analytic Sample Preparation Methods Analytical Chemistry Calibration Carbon - chemistry Chemistry Chromium - analysis Chromium - chemistry Electrical Equipment and Supplies Electrodes Environmental Pollutants - analysis Environmental Pollutants - chemistry Limit of Detection Reproducibility of Results
title	Determination of Chromium(VI) in Electronics Materials Using Trioctylamine Modified Carbon Paste Electrode
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