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Citation: LI Jian-Ping, LU Ji-Yong. Simultaneous Determination of Zinc, Cadmium and Lead by Potential Stripping Analysis Using Silver-solid Amalgam Electrode[J]. Chinese Journal of Applied Chemistry, ;2006, 23(9): 1006-1009. shu

Simultaneous Determination of Zinc, Cadmium and Lead by Potential Stripping Analysis Using Silver-solid Amalgam Electrode

LI Jian-Ping ^, ,
LU Ji-Yong

1.
Department of Material and Chemistry Engineering, Guilin University of Technology, Guilin 541004

Corresponding author: LI Jian-Ping,
Received Date: 18 October 2005
Available Online: 25 March 2006
Fund Project: 广西教育厅科研基金项目(桂教科2004[20]-02) (桂教科2004[20]-02)

A method for simultaneous determination of zinc,cadmium and lead by potential stripping analysis(PSA) using solid silver amalgam electrode(Ag-SAE) is described.The above mentioned cations were electrochemically accumulated for 60 s at-1.30 V(vs.SCE) in a HAc-NaAc(pH=5) buffer solution.Then the concentrated metals were stripped by PSA with the peaks appeared at -0.96 V for zinc, -0.66 V for cadmium and -0.49 V(vs.SCE) for lead respectively with the oxygen in the solution as the oxidant.The peak current linearly changed with the ion concentration in the range of 0~200 μg/L for Zn²⁺ and 0~100 μg/L for Cd²⁺ and Pb²⁺ respectively.The detection limits were 0.54 μg/L for Zn²⁺,0.30 μg/L for Cd²⁺ and 0.22 μg/L for Pb²⁺.The method has been applied to the determination of trace level of zinc, cadmium and lead in ground-water samples with satisfactory results.
- solid amalgam electrode,
- potential stripping analysis,
- zinc,
- cadmium,
- lead
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