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Journal of Radioanalytical and Nuclear Chemistry

, Volume 285, Issue 3, pp 593–598 | Cite as

Solvent extraction of calcium into nitrobenzene by using hydrogen dicarbollylcobaltate in the presence of dicyclohexano-18-crown-6 and dicyclohexano-24-crown-8

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

Abstract

Extraction of microamounts of calcium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B) in the presence of dicyclohexano-18-crown-6 (DCH18C6, L) and dicyclohexano-24-crown-8 (DCH24C8, L) has been investigated. The equilibrium data have been explained assuming that the species HL+, \( {\text{HL}}_{2}^{ + },\) CaL2+ and \( {\text{CaL}}_{2}^{2 + } \) (L = DCH18C6, DCH24C8) are present in the organic phase. The values of extraction and stability constants of the complex species in nitrobenzene saturated with water have been determined. It was found that the stability constants of CaL2+ (L = DCH18C6, DCH24C8) for both ligands under study are practically the same in nitrobenzene saturated with water, whereas in this medium the stability of the complex \( {\text{CaL}}_{2}^{2 + } \) involving the DCH24C8 ligand is somewhat higher than that of \( {\text{CaL}}_{2}^{2 + } \) with the ligand DCH18C6.

Keywords

Extraction Calcium Nitrobenzene Dicarbollylcobaltate Dicyclohexano-18-crown-6 Dicyclohexano-24-crown-8 Equilibrium constants Complexes 

Notes

Acknowledgements

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

References

  1. 1.
    Pedersen CJ (1967) J Am Chem Soc 89:2495CrossRefGoogle Scholar
  2. 2.
    Kolthoff IM (1979) Anal Chem 51:1RCrossRefGoogle Scholar
  3. 3.
    Makrlík E, Vaňura P (1985) Talanta 32:423CrossRefGoogle Scholar
  4. 4.
    Valentová Z, Makrlík E (2007) Acta Chim Slov 54:175Google Scholar
  5. 5.
    Makrlík E, Vaňura P, Selucký P (2008) Acta Chim Slov 55:223Google Scholar
  6. 6.
    Makrlík E, Vaňura P, Selucký P (2009) Z Phys Chem 223:253Google Scholar
  7. 7.
    Makrlík E, Vaňura P, Selucký P, Hálová J (2007) J Radioanal Nucl Chem 274:625CrossRefGoogle Scholar
  8. 8.
    Makrlík E, Vaňura P, Selucký P (2008) J Radioanal Nucl Chem 275:229CrossRefGoogle Scholar
  9. 9.
    Makrlík E, Vaňura P, Selucký P (2008) J Radioanal Nucl Chem 275:309CrossRefGoogle Scholar
  10. 10.
    Makrlík E, Vaňura P, Selucký P (2009) J Radioanal Nucl Chem 279:137CrossRefGoogle Scholar
  11. 11.
    Makrlík E, Vaňura P, Selucký P (2009) J Radioanal Nucl Chem 279:287CrossRefGoogle Scholar
  12. 12.
    Makrlík E, Vaňura P, Selucký P, Babain VA, Smirnov IV (2009) J Radioanal Nucl Chem 279:743CrossRefGoogle Scholar
  13. 13.
    Makrlík E, Vaňura P, Sedláková Z (2009) J Radioanal Nucl Chem 280:607CrossRefGoogle Scholar
  14. 14.
    Romanovskiy VN, Smirnov IV, Babain VA, Todd TA, Herbst RS, Law JD, Brewer KN (2001) Solvent Extr Ion Exch 19:1CrossRefGoogle Scholar
  15. 15.
    Law JD, Herbst RS, Todd TA, Romanovskiy VN, Babain VA, Esimantovskiy VM, Smirnov IV, Zaitsev BN (2001) Solvent Extr Ion Exch 19:23CrossRefGoogle Scholar
  16. 16.
    Makrlík E, Vaňura P, Selucký P (2009) J Solut Chem 38:1129CrossRefGoogle Scholar
  17. 17.
    Makrlík E (1992) Collect Czech Chem Commun 57:289CrossRefGoogle Scholar
  18. 18.
    Vaňura P (1999) J Radioanal Nucl Chem 241:493CrossRefGoogle Scholar
  19. 19.
    Makrlík E, Vaňura P, Selucký P (2006) J Radioanal Nucl Chem 268:167CrossRefGoogle Scholar
  20. 20.
    Makrlík E, Vaňura P, Selucký P (2009) Acta Chim Slov 56:475Google Scholar
  21. 21.
    Makrlík E, Vaňura P, Selucký P (2006) J Radioanal Nucl Chem 267:533CrossRefGoogle Scholar
  22. 22.
    Makrlík E, Vaňura P, Selucký P (2008) J Radioanal Nucl Chem 277:549CrossRefGoogle Scholar
  23. 23.
    Makrlík E, Vaňura P, Selucký P (2008) J Radioanal Nucl Chem 275:285CrossRefGoogle Scholar
  24. 24.
    Vaňura P, Makrlík E, Rais J, Kyrš M (1982) Collect Czech Chem Commun 47:1444Google Scholar
  25. 25.
    Vaňura P, Makrlík E (1993) Collect Czech Chem Commun 58:1324Google Scholar
  26. 26.
    Sillén LG, Warnqvist B (1969) Arkiv Kemi 31:315Google Scholar
  27. 27.
    Rais J, Šebestová E, Selucký P, Kyrš M (1976) J Inorg Nucl Chem 38:1742CrossRefGoogle Scholar
  28. 28.
    Kudo Y, Kanamori K, Takeda Y, Matsuda H (1995) Anal Sci 11:119CrossRefGoogle Scholar
  29. 29.
    Vaňura P (1999) Czech J Phys 49(Suppl S1):761Google Scholar

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 ChemistryFaculty of Chemical Engineering, Institute of Chemical TechnologyPrague 6Czech Republic
  3. 3.Nuclear Research InstituteŘežCzech Republic

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