应用化学 ›› 1992, Vol. 0 ›› Issue (6): 77-80.

• 研究简报 • 上一篇    下一篇

电流反馈倒数示波计时电位滴定法

郑建斌, 毕树平, 高鸿   

  1. 南京大学化学系, 南京 21000
  • 收稿日期:1991-11-19 修回日期:1992-05-03 出版日期:1992-12-10 发布日期:1992-12-10

FEEDING BACK CURRENT RECIPROCAL OSCILLOGRAPHIC CHRONOPOTENTIOMETRIC TITRATION

Zheng jianbin, Bi Shuping, Gao Hong(H. Kao)   

  1. Department of Chemistry, Nanjing University, Nanjing 210008
  • Received:1991-11-19 Revised:1992-05-03 Published:1992-12-10 Online:1992-12-10

摘要: 经典的示波计时电位滴定法是利用用dE/dt-E曲线上去极剂切口的出现或消失指示滴定终点,其优点是仪器简单、终点直观、准确快速[1],不足之处是有些去极剂在示波计时电位图上的切口不敏锐,当被测物含量较低,或用较低浓度的滴定剂进行滴定时,终点变化更不灵敏.难以进行滴定.倒数示波计时电位法能把dE/dt-E 曲线上的切口变为(dE/dt)-1曲线上的峰,提高了滴定终点指示的灵敏度[2]。本文将电流反馈技术[3]应用于倒数示波计时电位滴定和微分倒数示波计时电位滴定。

关键词: 电流反馈, 倒数示波计时电位滴定法

Abstract: The technique of feeding back current is applied to the reciprocal oseillographie chronopotentiometrie titration. Thus the capacity current can be greatly deducted and the sensibility of titration is enhanced If the feeding back current reciprocal oscillographic chronopotentiomerie curve is treated by differentiation, the sensibility of the titration will be sharply improved,

Key words: feeding back current, reciprocal oscillographic chronopotentiometric titration