Extraction of microamounts of strontium by a nitrobenzene solution of bis-1,2-dicarbollylcobaltate in the presence of 15-crown-5 |
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| Authors: | Z Valentová P Vaňura E Makrlík |
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| Institution: | (1) V. Nezvala 758, 272 04 Kladno 4, Czech Republic;(2) Department of Analytical Chemistry, Prague Institute of Chemical Technology, 166 28 Prague, Czech Republic;(3) Faculty of Education, Charles University, 116 39 Prague, Czech Republic;(4) Present address: 341 42 Kolinec 250, Czech Republic |
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| Abstract: | Extraction of85Sr by a nitrobenzene solution of bis-1,2-dicarbollylcobaltate in the presence of 15-crown-5 (15C5, L) has been investigated. The equilibrium data and the typical maxima concerning the dependencies of the Sr distribution ratios on the analytical concentration of 15C5 in the system under study can be explained assuming that the HL+, HL2
+ and SrL2
2+ species are extracted into the nitrobenzene phase. The values of the corresponding extraction and stability constants of the extracted species in nitrobenzene saturated with water have been determined. |
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