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Journal of Radioanalytical and Nuclear Chemistry

, Volume 287, Issue 1, pp 151–155 | Cite as

Solvent extraction of calcium and strontium into nitrobenzene by using hydrogen dicarbollylcobaltate in the presence of polypropylene glycol PPG 425

  • E. Makrlík
  • P. Vaňura
  • P. Selucký
Article

Abstract

Extraction of microamounts of calcium and strontium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B) in the presence of polypropylene glycol PPG 425 (L) has been investigated. The equilibrium data have been explained assuming that the species HL+, CaL2+ and SrL2+ (L = PPG 425) are extracted into the organic phase. The values of extraction and stability constants of the cationic complex species in nitrobenzene saturated with water have been determined. It was found that in water-saturated nitrobenzene, the stability constant of the complex SrL2+, where L is PPG 425, is somewhat higher than that of the species CaL2+ with the same ligand L.

Keywords

Extraction Calcium Strontium Dicarbollylcobaltate Water-nitrobenzene system Polypropylene glycol PPG 425 Complexes 

Notes

Acknowledgments

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

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2010

Authors and Affiliations

  1. 1.Faculty of Applied SciencesUniversity of West BohemiaPilsenCzech Republic
  2. 2.Department of Analytical ChemistryInstitute of Chemical TechnologyPrague 6Czech Republic
  3. 3.Nuclear Research InstituteŘežCzech Republic

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