Extraction of barium using nitrobenzene solution of sodium dicarbollylcobaltate in the presence of 15-crown-5

Authors
Makrlik, E Vanura, P Dankova, M
Citation
E. Makrlik et al., Extraction of barium using nitrobenzene solution of sodium dicarbollylcobaltate in the presence of 15-crown-5, J RAD NUCL, 242(1), 1999, pp. 207-209
Citations number
12
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
ISSN journal
02365731 → ACNP
Volume
242
Issue
1
Year of publication
1999
Pages
207 - 209
Database
ISI
SICI code
0236-5731(199910)242:1<207:EOBUNS>2.0.ZU;2-H
Abstract
From extraction experiments with Na-22 as a tracer, the extraction constant corresponding to the equilibrium Ba2+(aq)+2NaL(+)(nb)reversible arrow reve rsible arrow BaL22+(nb)+2Na(+)(aq) taking place in the two-phase water-nitr obenzene system (L = 15-crown-5, aq = aqueous phase, nb = nitrobenzene phas e) was evaluated as log K-ex(Ba2+,2NaL(+)) = 3.3+/-0.1. Further, the stabil ity constant of the complex BaL22+ in nitrobenzene saturated with water was calculated: log beta(nb)(BaL22+) = 16.4+/-0.1.