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Citation: ZHENG Jin-Bin, ZHANG Hong-Fang, DONG She-Ying. Oscillographic Determination of Zinc in Drug with Alizarin Red S[J]. Chinese Journal of Applied Chemistry, ;2003, 20(1): 83-85. shu

Oscillographic Determination of Zinc in Drug with Alizarin Red S

1.
Institute of Electroanalytical Chemistry Northwest University, Xi'an 710069

Corresponding author: ZHENG Jin-Bin,
Received Date: 23 March 2002
Available Online: 24 October 2002
Fund Project: 国家自然科学基金(20275030) (20275030)国家教育部科学技术研究重点项目(02187) (02187)高等学校骨干教师资助计划(GG150710062877) (GG150710062877)陕西省教委专项基金(01jk076)资助项目 (01jk076)

Alizarin red S(ARS) causes a sharp incision in 0.1 mol/L KBr. In the presence of Zn²⁺, the incision depth of ARS decreased and a new incision of Zn-ARS coordination compound appeared. A second order differential simple oscillographic voltammetric method for determination of Zn²⁺ was developed. The method is applied to the determination of zinc gluconate in tablet. The linear range of Zn²⁺ was 2.0×10^-7~8.6×10^-6 mol/L,detection limit 1×10^-7 mol/L, and RSD for determinations of 4.2×10^-6 mol/L Zn²⁺ (n=7) was 2.4%.
- alizarin red S,
- Zn,
- oscillographic determination,
- simple oscillographic voltammetry
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