高等学校化学学报 ›› 1988, Vol. 9 ›› Issue (4): 323.

• 论文 • 上一篇    下一篇

两Ag-TPB电极上的零电流示波双电位滴定法

卜海之, 高鸿   

  1. 南京大学化学系
  • 收稿日期:1986-10-10 出版日期:1988-04-24 发布日期:1988-04-24
  • 通讯作者: 高鸿

Zero-current Oscillo-bipotentiometric Titration on Two Ag-TPB Electrodes

Bu Haizi, Gao Hong(H. Kao)   

  1. Department of Chemistry, Nanjing University, Nanjing
  • Received:1986-10-10 Online:1988-04-24 Published:1988-04-24

摘要: 将银片(或碳棒、铂片等)依次浸入Na-TPB及AgNO3溶液中,得到用于示波电位滴定的Ag-TPB电极。在这种电极上进行双电位滴定。并用示波器直接指示⊿E的变化,确定滴定终点。方法简便灵敏,且可用于药物分析。

关键词: Ag-TPB电极, 示波滴定, 示波电位滴定, 示波双电位滴定, 零电流双电位滴定

Abstract: Silver tetraphenylborate(Ag-TPB) electrodes were prepared by successive soaking of silver plate (or graphite rod or platinum plate) in separate 0.05 rnol/Laqueous-solutions of Na-TPBand AgNO3 for 0.5 hour.The plate or rod was then-washed thoroughly with distilled water untill free from silver ions. Such electrodes can be-used as indicator electrodes for bipotentiometric titration of Na-TPB with AgNO3. The sudden change of potential difference(AE) between two indicator electrodes at the end point was observed with an oscillograph. The method has remarkable advantages over the ordinary bipotentiometric method and can be used in medicine analysis.

Key words: Ag-TPB electrode, Oscillo titration, Oscillo-bipotentiometric titra- tion, Oscillo-potentiometric titration, Zero-current bipotentiometric titration

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