Solvent extraction separation of cobalt(II) with 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (PC-88A)

被引：0
|
作者：
Jayachandran, J [1 ]
Dhadke, PM [1 ]
机构：
[1] Univ Bombay, Dept Chem Technol, Inorgan Chem Lab, Mumbai 400019, India
来源：
CHEMIA ANALITYCZNA | 1999年 / 44卷 / 02期
关键词：
cobalt(II); solvent extraction; 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester; spectrophotometry;
D O I：
暂无
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Liquid-liquid extraction of cobalt(II) from 0.25 mol l(-1) ammonium acetate using 0.05 mol l(-1) 2-ethylhexyl phosphonic acid mono 2-ethylhexyl ester (PC-88A) dissolved in toluene has been proposed. The stable blue coloured complex formed by PC-88A with cobalt(II) was used for direct spectrophotometric determination at 630 nm. It obeys Beer's law in the range 10-140 mu g ml(-1). Effect of various parameters such as reagent concentration, equilibration period, effect of various diluents and foreign ions on percentage extraction of cobalt were studied. This method was extended for the determination of cobalt in real samples. The extraction reaction proceeds with cation exchange mechanism and the extracted species has the Co2Ac2L2. 2HL formula.
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页码：157 / 165
页数：9
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