Solvent extraction of strontium and barium into nitrobenzene by using synergistic mixture of hydrogen dicarbollylcobaltate and dibenzo-24-crown-8

被引：0
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作者：
E. Makrlík
P. Vaňura
P. Selucký
机构：
[1] University of West Bohemia,Faculty of Applied Sciences
[2] Institute of Chemical Technology,Department of Analytical Chemistry, Faculty of Chemical Engineering
[3] Nuclear Research Institute,undefined
来源：
Journal of Radioanalytical and Nuclear Chemistry | 2010年 / 284卷
关键词：
Extraction; Strontium; Barium; Dibenzo-24-crown-8; Hydrogen dicarbollylcobaltate; Nitrobenzene; Complexes; Stability constants;
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摘要：
Extraction of microamounts of strontium and barium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B−) in the presence of dibenzo-24-crown-8 (DB24C8, L) has been investigated. The equilibrium data have been explained assuming that the species HL+, HL2+, ML2+, ML22+ and MHL23+ (M2+ = Sr2+, Ba2+) are extracted into the organic phase. The values of extraction and stability constants of the complexes in nitrobenzene saturated with water have been determined. It was found that the stability constants of the cationic complex species BaL2+ and BaL22+ in the considered nitrobenzene medium are somewhat higher than those of the corresponding complexes SrL2+ and SrL22+.
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页码：137 / 142
页数：5
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