Citation: Xun MAO, Huan Xin LAI, Ju Nan LI, Peng GAO, Zhi Hong YAN. Trace Determination of Zirconium(Ⅳ) by Anodic Adsorptive Voltammetry at a Carbon Paste Electrode[J]. Chinese Chemical Letters, ;2004, 15(11): 1315-1318. shu

Trace Determination of Zirconium(Ⅳ) by Anodic Adsorptive Voltammetry at a Carbon Paste Electrode

College of Chemistry Xiangtan University, Xiangtan 411105

Received Date: 9 October 2003

Fund Project: This research was supported by a grant from the Scientific Research Funds of State Key Laboratory of Electroanalytical Chemistry of Changchun Institute of Applied Chemistry, Chinese Academy of Sciences (SKLEAC2003-5) and Hunan Provincial Education Department of China (01Cl13).

A new sensitive adsorptive voltammetric method was described for the determination of zirconium at a carbon paste electrode (CPE) in the presence of alizarin complexone (ALC). Optimal analytical conditions are: 1.0×10^-6 or 5.0×10^-7 mol/L ALC, 0.20 mol/L HAC-NaAc (pH 4.3), accumulation for 60 s at 0V (vs. SCE), and linear scanning from 0V to 1.0V at 250 mV/s. The peak potential of the complex is at 0.81V. By using a model JP-303 polarographic analyzer, 2.0×10^-10 mol/L (S/N=3) zirconium can be detected with a 90 s accumulation, when the 2nd-order derivative linear sweep technique is used, and the linear range is 6.0×10^-10-2.0×10^-8 mol/L (5.0×10^-7 mol/L ALC) and 2.0×10^-8-2.0×10^-7mol/L (1.0×10^-6 mol/L ALC), respectively. The developed method was applied to the determination of trace zirconium in the ore samples with satisfactory results.
- Zirconium,
- alizarin complexone,
- carbon paste electrode,
- anodic adsorptive voltamme-try
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