引用本文:
郑建斌, 张宏芳, 董社英. 茜素红S用于含锌药物的示波测定[J]. 应用化学,
2003, 20(1): 83-85.
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.
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.
茜素红S用于含锌药物的示波测定
摘要:
茜素红S(茜素磺酸钠,Alizarin red S,ARS)是一种具有羟基蒽醌结构的指示剂。它能与许多金属离子形成水溶性配合物,主要用于光度法测定Al3+、Ga3+、In3+和稀土元素离子[1]。对含锌药物葡萄糖酸锌片的含量测定,药典[2]采用EDTA滴定法,操作麻烦;李焕德等[3]用原子吸收光谱法测定了锌制剂的含量,灵敏度不高。
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关键词:
- 茜素红S
- / 锌
- / 示波测定
- / 二次微分简易示波伏安法
English
Oscillographic Determination of Zinc in Drug with Alizarin Red S
Abstract:
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%.
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Key words:
- alizarin red S
- / Zn
- / oscillographic determination
- / simple oscillographic voltammetry
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