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Updated: May 25, 2026

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium
Published on: December 17, 2018
Anodic stripping voltammetric measurement of trace cadmium at tin-coated carbon paste electrode
Bang Lin Li1, Zhi Ling Wu, Chang Hong Xiong
1Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
Abstract:
A carbon paste electrode modified with tin was used for the determination of trace cadmium by anodic stripping voltammetry. The electroanalytical performance for the determination of Cd(II) on the tin-coated carbon paste electrode(SnF-CPE) was better than that on the carbon paste electrode. The measuring conditions have been optimized. The measurement of trace cadmium on the SnF-CPE has the best response under the conditions of 0.10molL(-1) acetate buffer solution (pH 3.9), 3.5mgL(-1) Sn(II), deposition potential of -1.40V, and deposition time of 150s. The SnF-CPE revealed highly linear behavior in the concentration range of 2.0-90.0μgL(-1) with the detection limit of 1.13μgL(-1) for Cd(II). The developed sensor has been applied to the determination of Cd(II) in real water samples with satisfactory results.
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