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Analytical Letters Volume 38, 2005 - Issue 13
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Chemical and Biosensors

Nafion‐Modified Glassy Carbon Electrode for Trace Determination of Indium

Cuili Xiang Department of Chemistry, Central China Normal University, Wuhan, P.R. China
,
Yongjin Zou Department of Chemistry, Central China Normal University, Wuhan, P.R. China
,
Jingjing Xie Department of Material, Wuhan University of Technology, Wuhan, P.R. China
,
Ximing Fei Department of Chemistry, Central China Normal University, Wuhan, P.R. China
&
Junhua Li Department of Chemistry, Central China Normal University, Wuhan, P.R. China
Pages 2045-2055 | Received 16 Jun 2005, Accepted 24 Jun 2005, Published online: 02 Feb 2007
 
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Abstract

A new method for determination of trace indium is proposed by the adsorption stripping voltammetry (ASV) using a Nafion‐modified glassy carbon electrode (NMGCE). This chemically modified electrode (CME) shows a better stability. A sensitive oxidation peak was observed, and the anodic peak potential is ca. −0.548 V (vs. SCE). The influences of various experimental parameters on the current peak were completely studied. Under the optimized condition, the method has been applied to the determination of indium in water samples. There is a good linear relationship between the peak current (ip) and indium(III) concentration in the range of 1.0×10−9–1.0×10−7 mol/l, and the limit of detection is 7.5×10−10 mol/l.

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