高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (4): 450.

• 论文 • 上一篇    下一篇

海水中重金属离子络合形态的研究(Ⅰ)--二阶导数卷积悬汞电极溶出伏安法

莫金垣, 蔡沛祥, 郑家龙, 郑培生, 梁浩波   

  1. 中山大学化学系, 510275
  • 收稿日期:1989-11-14 出版日期:1991-04-24 发布日期:1991-04-24
  • 通讯作者: 莫金垣

Studies on the Complex States of Heavy Metal Ions in Seawater (Ⅰ)--2nd Order Derivative Convolution Stripping Voltammetry at HMDE

Mo Jin-yuan, Cai Pei-xiang, Zheng Jia-long, Zheng Pei-sheng, Liang Hao-bo   

  1. Department of Chemistry, Zhongshan University, Guangzhou, 510275
  • Received:1989-11-14 Online:1991-04-24 Published:1991-04-24

摘要: 本文推导了络合体系中悬汞电极二阶导数卷积阳极溶出峰电势与络合物累积稳定常数的关系式,在模拟海水离子强度溶液中,测定了一系列简单金属离子及其络合物的溶出峰电势差,用电子计算机进行数学回归分析作曲线拟合,求得了Cd(Ⅱ)-SO42络合体系的各级累积稳定常数,并对海水中镉(Ⅱ)的存在形态作了综合估算。

关键词: 络合形态, 稳定常数, 二阶导数卷积伏安法, 溶出伏安法

Abstract: The relationship between the complex stability constants and peak potential of 2nd order derivative convolution anodic stripping voltammetry at HMDE has been established. The expression is as follows: The shift of peak potential varies with the concentration of the ligand, the differences between the peak potential of free metal ions and that of the complex ions are measured at constant ionic strength and various concentrations of the ligand.

Key words: Complex state, Stability constant, 2nd order derivative convolution voltammetry, Stripping voltammetry

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