Journal of Radioanalytical and Nuclear Chemistry

, Volume 297, Issue 1, pp 115-118

First online:

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

  • E. MakrlíkAffiliated withFaculty of Environmental Sciences, Czech University of Life Sciences, Prague Email author 
  • , P. VaňuraAffiliated withDepartment of Analytical Chemistry, Institute of Chemical Technology, Prague
  • , P. SeluckýAffiliated withNuclear Research Institute

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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 cation Dodecaethylene glycol Complexation Hydrogen dicarbollylcobaltate Water–nitrobenzene system Extraction and stability constants