Solvent extraction of europium and americium into phenyltrifluoromethyl sulfone by using synergistic mixture of hydrogen dicarbollylcobaltate and “classical” CMPO

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


Extraction of microamounts of europium and americium by a phenyltrifluoromethyl sulfone (FS 13) solution of hydrogen dicarbollylcobaltate (H+B) in the presence of octyl-phenyl-N,N-diisobutylcarbamoylmethyl phosphine oxide (“classical” CMPO, L) has been investigated. The equilibrium data have been explained assuming that the complexes \( {\text{HL}}_{{}}^{ + } \), \( {\text{HL}}_{2}^{ + } \), \( {\text{ML}}_{ 2}^{3 + } \), \( {\text{ML}}_{ 3}^{3 + } \) and \( {\text{ML}}_{ 4}^{3 + } \) (M3+ = Eu3+, Am3+) are extracted into the organic phase. The values of extraction and stability constants of the cationic complex species in FS 13 saturated with water have been determined. It was found that the stability constants of the corresponding complexes \( {\text{EuL}}_{n}^{3 + } \) and \( {\text{AmL}}_{n}^{3 + } \), where n = 2, 3, 4 and L is “classical” CMPO, in water-saturated FS 13 are comparable.


Extraction Europium Americium Phenyltrifluoromethyl sulfone Dicarbollylcobaltate Complexes CMPO 



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


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© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  1. 1.Faculty of Applied SciencesUniversity of West BohemiaPilsenCzech Republic
  2. 2.Department of Analytical ChemistryInstitute of Chemical Technology, Prague, Faculty of Chemical EngineeringPragueCzech Republic
  3. 3.Nuclear Research InstituteŘežCzech Republic

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