TITLE

Solvent extraction of microamounts of strontium and barium into nitrobenzene by using synergistic mixture of hydrogen dicarbollylcobaltate and dicyclohexano-18-crown-6

AUTHOR(S)
Makrlík, E.; Vaňura, P.; Selucký, P.
PUB. DATE
September 2009
SOURCE
Journal of Radioanalytical & Nuclear Chemistry;Sep2009, Vol. 281 Issue 3, p633
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Extraction of microamounts of strontium and barium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B−) in the presence of dicyclohexano-18-crown-6 (DCH18C6, L) has been investigated. The equilibrium data have been explained assuming that the complexes HL+, $$ {\text{HL}}_{ 2}^{ + } $$, ML2+ and $$ {\text{ML}}_{ 2}^{ 2+ } $$ (M2+ = Sr2+, Ba2+) are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene saturated with water have been determined. It was found that in the mentioned medium the stability constants of the complexes BaL2+ and $$ {\text{BaL}}_{2}^{2 + }, $$where L = DCH18C6, are somewhat higher than those of the species SrL2+ and $$ {\text{SrL}}_{2}^{2 + } $$ with the same ligand L.
ACCESSION #
44513684

 

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