Solvent extraction of strontium and barium into nitrobenzene by using synergistic mixture of hydrogen dicarbollylcobaltate and dibenzo-24-crown-8

• Published in: Journal of radioanalytical and nuclear chemistry Vol. 284; no. 1; pp. 137 - 142
• Main Authors: Makrlik, E, Vanura, P, Selucky, P
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.04.2010; Springer
• Subjects: Barium; Cationic; Chemistry; Chemistry and Materials Science; Diagnostic Radiology; Hadrons; Heavy Ions; Hydrogen; Inorganic Chemistry; Nitrobenzenes; Nuclear Chemistry; Nuclear Physics; Physical Chemistry; Solvent extraction; Stability constants; Strontium; Strontium; Barium; Nitrobenzene; Hydrogen dicarbollylcobaltate; Extraction; Stability constants; Dibenzo-24-crown-8; Complexes
• ISSN: 0236-5731; 1588-2780
• DOI: 10.1007/s10967-010-0451-6

Extraction of microamounts of strontium and barium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H + B − ) in the presence of dibenzo-24-crown-8 (DB24C8, L) has been investigated. The equilibrium data have been explained assuming that the species HL + , HL 2 + , ML 2+ , ML 2 2+ and MHL 2 3+ (M 2+  = Sr 2+ , Ba 2+ ) are extracted into the organic phase. The values of extraction and stability constants of the complexes in nitrobenzene saturated with water have been determined. It was found that the stability constants of the cationic complex species BaL 2+ and BaL 2 2+ in the considered nitrobenzene medium are somewhat higher than those of the corresponding complexes SrL 2+ and SrL 2 2+ .