高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (5): 605.

• 论文 • 上一篇    下一篇

示波极谱中和指示剂的原理(Ⅰ)——苯胺与荧光素钠

陈扬, 翁筠蓉, 高鸿   

  1. 南京大学化学系, 南京, 210008
  • 收稿日期:1991-05-09 出版日期:1992-05-24 发布日期:1992-05-24
  • 通讯作者: 陈扬
  • 基金资助:

    国家自然科学基金

The Principle of Oscillopolarographic Neutralization Indicators (Ⅰ)——Aniline and Fluorescein Sodium

CHEN Yang, WENG Yun-rong, GAO Hong(H. Kao)   

  1. Department of Chemistry, Nanjing University, Nanjing, 210008
  • Received:1991-05-09 Online:1992-05-24 Published:1992-05-24

摘要: 示波极谱滴定所用的中和滴定指示剂,其终点的pH值变化范围为普通中和指示剂的十分之一,可用于水溶液中极弱酸(碱)的直接滴定,非常有用.但示波中和指示剂切口变化的机理没有研究过,本文研究了示波中和指示剂荧光素钠和苯胺随pH的变化,以及其切口产生或消失的机理.

关键词: 示波滴定指示剂, 荧光素钠, 苯胺, 切口机理

Abstract: The present paper covers the mechanism of incision formation in oscillopolarograms about aniline and fluorescein sodium as oscillopolarographic neutralization indicators.The incision change of fluorescein sodium is due to oxido-reduction and that of aniline due to absorption of the indicators at the polarized electrode.

Key words: Oscillopolarographic titration indicators, Fluorescein sodium, Aniline, Mechanism of incision

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