高等学校化学学报 ›› 1987, Vol. 8 ›› Issue (5): 424.

• 研究简报 • 上一篇    下一篇

双铂电极交流示波电位滴定法

徐伟建, 张胜义, 高鸿   

  1. 南京大学化学系
  • 收稿日期:1986-01-27 出版日期:1987-05-24 发布日期:1987-05-24
  • 基金资助:

    中国科学院科学基金

Alternating Current Oscillo Potentiometric Titrations on Two Identical Pt Electrodes

Xu Weijian, Zhang Shengyi, Gao Hong(H. Kao)   

  1. Department of Chemistry, Nanjing University, Nanjing
  • Received:1986-01-27 Online:1987-05-24 Published:1987-05-24

摘要: 将两个同样大小的铂电极插入被滴定溶液中,让一个很小的交流电流通过两个电极并用示波器直接观察两极间的电位差(图1),荧光屏上出现一条荧光线,用荧光线的突然收缩或伸长指示滴定终点,这种简易的电滴定方法称为双铂电极交流示波电位滴定法。

Abstract: Two identical Pt electrodes are put in the titrate. Asmall alternating current is passed through the electrodes which arc connected directly to an oscillograph. Afluorescent line showing the potential difference between the two electrodes appears on the screen. The sudden expand or contract of the line indicate the end point of titration. The end point is very sharp, especially in titration of a reversible titrate with a reversible titrant.

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