高等学校化学学报 ›› 1984, Vol. 5 ›› Issue (4): 477.

• 论文 • 上一篇    下一篇

示波极谱滴定的研究(ⅩⅠⅩ)——利用氨羧络合剂自身的切口示波极谱络合滴定法

陶曙光, 高鸿   

  1. 南京大学化学系
  • 收稿日期:1983-06-27 出版日期:1984-10-24 发布日期:1984-10-24

Investigation on Oscillopolarographic Titrations (ⅩⅪ)——Oscillopolarographic Chelometric Titrations Using the Incisions Produced by Addition of Chelating Reagents to Mercury Electrodes

Tao Shuguang, Gao Hong(H. Kao)   

  1. Department of Chemistry, Nanjing University, Nanjing
  • Received:1983-06-27 Online:1984-10-24 Published:1984-10-24

摘要: 本文提出利用氨羧络合剂自身的切口来指示滴定终点,对那些示波图上无切口或者切口迟顿难以直接滴定的金属进行直接滴定,为CO、Ni、Mn、Ca、Mg、Sr及稀土离子的简便滴定方法.

Abstract: Oscillopolarographic chelometric titrations usually use the disappearance of the incisions of the electrode active ions to be titrated to indicate end-points of titrations. When the titrated ion is not electro-active, an indicator is usually required. It was found that EDTAand its related compounds such as DTPAand CyDTAcould complex with Hg3+ ions produced on mercury electrode and thus yield incisions of Hg2+ complexes which could be used to indicate the end-point of the chelometric titra-tion. Aseries of such titrations without indicators have been developed. It was shown that direct titrations of Ca3+ , Mg3+ , Sr3+ , Ni3+ , Mn2+, Co3+ and lanthanide ions could be carried out with DTPA and CyDTA and even EDTA.

TrendMD: