锑(Ⅲ)-棓酸配合物示差脉冲吸附溶出伏安法研究

高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (5): 607.

锑(Ⅲ)-棓酸配合物示差脉冲吸附溶出伏安法研究

李益恒, 姚慰宽, 唐嗣霖

湘潭大学化学系, 411105

收稿日期:1989-12-06 出版日期:1991-05-24 发布日期:1991-05-24
通讯作者: 李益恒
基金资助:
中国科学院科学基金

Studies on the Differential Pulse Adsorptive Stripping Voltammetry of Antimony (Ⅲ)-Gallic Acid Complex

Li Yi-heng, Yao Wei-kuan, Tang Si-lin

Department of Cliemistry, Xiungtan University, 411105

Received:1989-12-06 Online:1991-05-24 Published:1991-05-24

摘要/Abstract

摘要： 本文在前文的基础上,进一步研究了锑(Ⅲ)-棓酸配合物在醋酸盐缓冲溶液中的示差脉冲吸附伏安特性,探讨了反应机理,用拟定的方法测定了铜合金中的痕量锑,结果满意。

关键词: 锑棓酸, 示差脉冲吸附溶出伏安法

Abstract: In the 0. 10 mol/Lacetate buffer solution with pH 4.4, a sensitive reduction wave of antimony-gallic acid complex has been obtained at-0. 47 V (vs. Ag/AgCl) using differential pulse voltammetry. The peak current is linearly proportional to the concentration of antimony in the range of 4. 0×10^-10to 8. 0×10^-8mol/Lafter a 2 min accumulation. The reaction mechanism has been discussed. It is shown that the current is caused by the reductioin of antimony (It) bonded in the complex which is adsorbed on the hanging mercury drop electrode, and that the adsorption of the complex obeys Frumkin isotherm. The proposed method has been applied to the determination of trace antimony in copper alloys with satisfactory results.

Key words: Antimony, Gallic acid, Differential pulse adsorptive stripping voltammetry

TrendMD:

李益恒, 姚慰宽, 唐嗣霖. 锑(Ⅲ)-棓酸配合物示差脉冲吸附溶出伏安法研究. 高等学校化学学报, 1991, 12(5): 607.

Li Yi-heng, Yao Wei-kuan, Tang Si-lin . Studies on the Differential Pulse Adsorptive Stripping Voltammetry of Antimony (Ⅲ)-Gallic Acid Complex. Chem. J. Chinese Universities, 1991, 12(5): 607.