高等学校化学学报 ›› 1985, Vol. 6 ›› Issue (11): 986.

• 研究简报 • 上一篇    下一篇

管式金电极差分脉冲阳极溶出伏安法测定水中痕量硒

万桢, 陈强   

  1. 厦门大学化学系
  • 收稿日期:1984-08-29 出版日期:1985-11-24 发布日期:1985-11-24

Differential Pulse Anodic Stripping Voltammetry of Trace Se on a Tubular Guld Electrode

Wan Zhen, Chen Qiang   

  1. Department of Chemistry, Xiamen University, Xiaman
  • Received:1984-08-29 Online:1985-11-24 Published:1985-11-24

摘要: 阳极溶出伏安法测定硒已见报导。本文主要介绍了采用管式金电极为流通池,差分脉冲阳极溶出伏安法测定水中痕量硒的方法。管式电极流通池的制作和应用很方便,测定方法具有快速、灵敏、可靠、可用于连续分析的特点。本实验证实了管式电极和差分脉冲法联合应用的理论及其在分析应用中的优越性。本方法可望在现代连续流动分析中推广应用。

Abstract: The differential pulse anodic stripping voltammetric determination of trace Se in water using a flow-through cell with a tubular gold electrode was reported. The tubular electrobe was easy to be constructed and operated, and reguired only small volume of sample. The signal obtained was stable and high reproducible. In a medium of 0.8Msulfuric acid, a sensitive stripping peak of Se at +0.88v(VS S. Ag/AgCl) was observed. The detection limit was showen to be 0.02ppb.Alinear dependence of peak height on concentration of Se over a range of 10-10 to 10-8 g/ml was also observed. It was used to determine trace selenium in water with satifactory result.The current-concentration equations for the differential pulse anodic stripping voltammetry on a tubular electrode have been theoretically derived and experimentally verified.

TrendMD: