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化学学报
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化学学报 ›› 1964, Vol. 30 ›› Issue (6): 546-556. 上一篇    下一篇

论文

汞电极法研究络合物的稳定性Ⅰ.二价金属的EDTA络合物

严志弦, 柳树诚   

  1. 复旦大学化学系
  • 投稿日期:1963-12-05 发布日期:2013-06-03

MERCURY ELECTRODE IN THE STUDY OF COMPLEXES Ⅰ. STABILITY CONSTANTS OF EDTA CHELATES OF BIVALENT METALS

HIH-HSIEN, LIU SHU-CHENG   

  1. Department of Chemistry, Fu-Tan University
  • Received:1963-12-05 Published:2013-06-03

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683

被引次数

2

本文改进Schwarzenbach和Reilley等所用的方法,用汞电极测得多种二价金属(Hg,Cu,Pb,Zn,Cd,Mn,Ca,Mg,Sr,Ba)的乙二胺四乙酸螯合物的稳定常数,结果见表5.实验条件:t=30.0±0.1°,μ=0.1,参比电极是0.1 M Ag-AgCl电极.溶液的组分浓度是 Hg:0.001 M HgY2-+0.001 MY4- Cu,Pb,Zn,Cd:0.0001 MHgY2-+0.01 MMeY2-+0.001 MMe2+ Zn,Cd,Mn,Ca,Mg,Sr,Ba:0.001 M HgY2-+0.001 MMeY2-+0.001 MMe2+ Schwarzenbach主张在测试溶液中预加若干金属汞,而Reilley等则未加.本文对CaY2-作加汞与不加汞的试验,证明加汞并非必要.达到平衡的时间,无论加汞与否,都为十六小时.

The electrochemical method for the determination of metal chelate stability constants by means of potentiometric measurement with a mercury electrode has been applied to EDTA complexes.of divalent metals at 30.0±0.1° in the presence of potassium nitrate.The basic principle of this method is based upon the exchange equilibria of the type.