Reminescences

Extraction of Microamounts of Barium in the System: Water - CsCl - 18-Crown-6 -Nitrobenzene - Cesium Dicarbollylcobaltate

Marcela Daňková ; Kremličkova 964, 280 00 Kolin II, Czech Republic
Petr Vaňura ; Department of Analytical Chemistry, Prague Institute of Chemical Technology, 166 28 Prague, Czech Republic
Emanuel Makrlík ; Institute of Physical Engineering, University ofWest Bohemia, Veleslavínova 11, 30114 Pilsen, Czech Republic

Abstract

Extraction of microamounts of barium with a nitrobenzene solution of cesium dicarbollylcobaltate (Cs+B-) in the presence of 18-crown-6 (18C6, L) has been investigated. Equilibrium data have been explained assuming that the complexes CsL+, CsL₂+, BaL2+ and BaL₂2+ are extracted into the organic phase. Values of extraction and stability constants of the species in nitrobenzene saturated with water have been determined.

Keywords

barium; 18-crown-6; dicarbollylcobaltate; water - nitrobenzene extraction system

Hrčak ID:

132019

URI

https://hrcak.srce.hr/132019

Publication date:

4.9.2000.

Visits: 865 *