Journal of Radioanalytical and Nuclear Chemistry

, Volume 297, Issue 1, pp 115–118

Synergistic extraction of sodium into nitrobenzene by using hydrogen dicarbollylcobaltate and dodecaethylene glycol


    • Faculty of Environmental SciencesCzech University of Life Sciences, Prague
  • P. Vaňura
    • Department of Analytical ChemistryInstitute of Chemical Technology, Prague
  • P. Selucký
    • Nuclear Research Institute

DOI: 10.1007/s10967-012-2317-6

Cite this article as:
Makrlík, E., Vaňura, P. & Selucký, P. J Radioanal Nucl Chem (2013) 297: 115. doi:10.1007/s10967-012-2317-6


Solvent extraction of microamounts of sodium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B) in the presence of dodecaethylene glycol (DDEG, L) has been investigated. The equilibrium data have been explained assuming that the species HL+, H2L2+, NaL+ and NaHL2+ (L = DDEG) are extracted into the organic phase. The values of extraction and stability constants of the complex species in nitrobenzene saturated with water have been determined.


Sodium cationDodecaethylene glycolComplexationHydrogen dicarbollylcobaltateWater–nitrobenzene systemExtraction and stability constants

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2012