Anodic stripping voltammetric measurement of trace cadmium at tin-coated carbon paste electrode

作者：Li Bang Lin; Wu Zhi Ling; Xiong Chang Hong; Luo Hong Qun; Li Nian Bing^*

来源：Talanta, 2012, 88: 707-710.

DOI：10.1016/j.talanta.2011.11.070

• Tin film electrode
• Carbon paste electrode
• Cadmium(II) determination
• Stripping analysis

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 0.10 mol L-1 acetate buffer solution (pH 3.9), 3.5 mg L-1 Sn(II), deposition potential of -1.40 V. and deposition time of 150 s. The SnF-CPE revealed highly linear behavior in the concentration range of 2.0-90.0 mu g L-1 with the detection limit of 1.13 mu g L-1 for Cd(II). The developed sensor has been applied to the determination of Cd(II) in real water samples with satisfactory results.

• 出版日期2012-1-15
• 单位西南大学