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Solvent extraction of strontium and barium into nitrobenzene by using hydrogen dicarbollylcobaltate in the presence of dicyclohexano-24-crown-8

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Abstract

Extraction of microamounts of strontium and barium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B−) in the presence of dicyclohexano-24-crown-8 (DCH24C8, 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 water–saturated nitrobenzene, the stability constants of the complexes BaL2+ and \( {\text{BaL}}_{ 2}{^{2 + }}, \) where L = DCH24C8, are somewhat higher than those of the corresponding species SrL2+ and \( {\text{SrL}}_{ 2}{^{2 + }} \) with the same ligand L.

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Acknowledgements

The present work was supported by the Czech Ministry of Education, Youth and Sports, Projects MSM 4977751303 and MSM 6046137307.

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Authors and Affiliations

  1. Faculty of Applied Sciences, University of West Bohemia, Husova 11, 306 14, Pilsen, Czech Republic

    E. Makrlík

  2. Department of Analytical Chemistry, Faculty of Chemical Engineering, Institute of Chemical Technology, Prague, Czech Republic

    P. Vaňura

  3. Nuclear Research Institute, 250 68, Řež, Czech Republic

    P. Selucký

Authors
  1. E. Makrlík
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  2. P. Vaňura
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  3. P. Selucký
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Correspondence to E. Makrlík.

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Makrlík, E., Vaňura, P. & Selucký, P. Solvent extraction of strontium and barium into nitrobenzene by using hydrogen dicarbollylcobaltate in the presence of dicyclohexano-24-crown-8. J Radioanal Nucl Chem 283, 615–619 (2010). https://doi.org/10.1007/s10967-009-0394-y

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