Differential Pulse Anodic Stripping Voltammetric Determination of Cadmium(ii) at a Glassy Carbon Electrode Modified with a Nano-TiO2/Chitosan Composite Film

Zhimin Xie; Junjie Fei; Meihua Huang

doi:10.1071/CH08353

RESEARCH ARTICLE

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Differential Pulse Anodic Stripping Voltammetric Determination of Cadmium(ii) at a Glassy Carbon Electrode Modified with a Nano-TiO₂/Chitosan Composite Film

Zhimin Xie ^A , Junjie Fei ^A ^B ^C and Meihua Huang ^B

+ Author Affiliations

- Author Affiliations

^A Department of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China.

^B Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China.

^C Corresponding author. Email: fei_junjie@xtu.edu.cn

Australian Journal of Chemistry 61(12) 1000-1005 https://doi.org/10.1071/CH08353
Submitted: 20 August 2008 Accepted: 18 November 2008 Published: 10 December 2008

Abstract

A simple and effective chemically modified electrode for the determination of cadmium(ii) was developed. The chemically modified electrode was prepared by modifying nano-TiO₂/chitosan (nano-TiO₂/CS) composite film onto a glassy carbon (GC) electrode. Compared with a bare GC electrode and a CS film-modified GC electrode, the nano-TiO₂/CS composite film-coated GC electrode significantly improved the sensitivity of determining Cd^II. The effects of experimental parameters such as modifier composition in the GC electrode, pH of supporting electrolyte, accumulation potential and time were studied for analytical application. Under the optimized working conditions, the peak currents were linear with concentration over the range from 1.0 × 10^–9 to 1.0 × 10^–6 mol L^–1 for Cd^II. The limit of detection is 2.0 × 10^–10 mol L^–1 Cd^II for 180-s accumulation. The application for the assay of trace levels of Cd^II in real water samples indicates that it is an economical and potent method.

Acknowledgements

The present work was supported by the Key Project of Chinese Ministry of Education (no. 206104), the Open Project Program of Key Laboratory of Low Dimensional Materials and Application Technology (Xiangtan University), Ministry of Education, China (no. KF0501), and the Multidiscipline Scientific Research Foundation of Xiangtan University (05IND08).

References

Differential Pulse Anodic Stripping Voltammetric Determination of Cadmium(ii) at a Glassy Carbon Electrode Modified with a Nano-TiO2/Chitosan Composite Film

Abstract

Acknowledgements

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Differential Pulse Anodic Stripping Voltammetric Determination of Cadmium(ii) at a Glassy Carbon Electrode Modified with a Nano-TiO₂/Chitosan Composite Film