Extraction of microamounts of calcium in the two-phase water-HCl-18-crown-6-nitrobenzene-hydrogen dicarbollylcobaltate system |
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| Authors: | E Makrlík P Vaňura P Selucký |
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| Institution: | (1) Faculty of Applied Sciences, University of West Bohemia, Husova 11, 306 14 Pilsen, Czech Republic;(2) Prague Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic;(3) Nuclear Research Institute, 250 68 Řež, Czech Republic |
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| Abstract: | Summary Extraction of microamounts of calcium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of 18-crown-6 (18C6, L) has been investigated. The equilibrium data have been explained assuming that the
complexes HL+, CaL2+and CaL are extracted into the organic phase. The values of extraction and stability constants of the complex species in nitrobenzene
saturated with water have been determined. |
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