Journal of Radioanalytical and Nuclear Chemistry

, Volume 267, Issue 2, pp 493–495 | Cite as

Extraction of silver from water into nitrobenzene using sodium dicarbollylcobaltate in the presence of valinomycin

  • E. Makrlík
  • P. Vaňura
Article

Summary

From extraction experiments andg-activity measurements, the extraction constant corresponding to the Ag+(aq) + NaL+(nb)ÛAgL+(nb) + Na+(aq) equilibrium in the two-phase water-nitrobenzene system (L=valinomycin; aq=aqueous phase, nb=nitrobenzene phase) was evaluated as log K ex(Ag+,NaL+)=-0.6±0.1. The stability constant of the valinomycin-silver complex in nitrobenzene saturated with water was calculated: log b nb(AgL+)=4.6±0.1. The stability constants of complexes of some univalent cations with valinomycin were summarized and discussed.

Keywords

Sodium Physical Chemistry Inorganic Chemistry Aqueous Phase Stability Constant 
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Copyright information

© Springer-Verlag/Akadémiai Kiadó 2006

Authors and Affiliations

  • E. Makrlík
    • 1
  • P. Vaňura
    • 2
  1. 1.Faculty of Applied Sciences, University of West Bohemia
  2. 2.Prague Institute of Chemical Technology

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