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Citation: DENG Pei-Hong, ZHANG Jun, LI Ju-Nan. Cathodic Adsorptive Voltammetry of Zirconium-calcium-alizarin Red SMix-polynuclear Complex at a Carbon Nanotube Modified Electrode[J]. Chinese Journal of Applied Chemistry, ;2008, 25(6): 722-725. shu

Cathodic Adsorptive Voltammetry of Zirconium-calcium-alizarin Red SMix-polynuclear Complex at a Carbon Nanotube Modified Electrode

1.
a Department of Chemistry and Materials Science, Hengyang Normal College, Hengyang 421008;
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b College of Chemistry, Xiangtan University, Xiangtan

Corresponding author: DENG Pei-Hong,
Received Date: 21 July 2007
Available Online: 12 October 2007
Fund Project: 衡阳市科学技术局(2007KJ001) (2007KJ001)衡阳师范学院科学基金(07A19)资助项目 (07A19)

A new method for the determination of trace amounts of zirconium was described.A multi-walled carbon nanotube modified carbon black microelectrode was prepared and the cathodic adsorptive voltammetric behavior of the zirconium-calcium-alizarin red S(ARS) mix-polynuclear complex at the modified electrode was investigated.Via the second derivative linear sweep technique,it was found that in a buffer solution of 0.096 mol/L acetic acid and 0.048 mol/L potassium biphthalate (pH=3.8),the complex adsorbed to the modified electrode,yielding one sensitive peak at -502 mV (vsSCE).The peak current of the complex was linearly correlated with Zr(Ⅳ) concentration in a range of 6.0×10^-12~8.0×10^-7 mol/L,and the detection limit was 4.0×10^-12 mol/L (S/N=3) for 180 s accumulation.The method was applied to the determination of trace zirconium in ore samples and the results were satisfactory.
- carbon nunotube,
- modified electrode,
- cathodic adsorption voltammetry,
- zirconium
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