Determination of Cadmium in Eel by Microwave Digestion Followed by Stripping Voltammetry on Bismuth/Nafion Modified Electrode

doi:10.7506/spkx1002-6630-201114039

Abstract

Abstract: A stripping voltammetric method based on microwave digestion was developed for determining cadmium in eel on a bismuth/nafion modified electrode. Oxidation yield a well-defined square wave peak for Cd2+ at about －0.85 V. Nafion concentration, bismuth film thickness, buffer solution pH, deposition potential accumulation time and other potential interference factors were investigated. A linear relationship was found between peak area and cadmium concentration over the range of 4.0 to 14.0μg/L with a correlation coefficient of 0.9964. The limit of detection of the method was 0.2μg/L. The sensor was highly sensitive and effective to detect cadmium even in the presence of several excess potential interference ions.

Key words: microwave digestion, stripping voltammetry, bismuth, nafion, cadmium

CLC Number:

O657. 1

LI Jing，LI Hong-bo，FAN Da-he，WANG Wei. Determination of Cadmium in Eel by Microwave Digestion Followed by Stripping Voltammetry on Bismuth/Nafion Modified Electrode[J]. FOOD SCIENCE, 2011, 32(14): 190-193.

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Determination of Cadmium in Eel by Microwave Digestion Followed by Stripping Voltammetry on Bismuth/Nafion Modified Electrode

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