EXTRACTION STUDIES OF THORIUM(IV) WITH TRIPHENYLPHOSPHINE OXIDE

Authors
BHILARE NG SHINDE VM
Citation
Ng. Bhilare et Vm. Shinde, EXTRACTION STUDIES OF THORIUM(IV) WITH TRIPHENYLPHOSPHINE OXIDE, Journal of radioanalytical and nuclear chemistry, 185(2), 1994, pp. 243-250
Citations number
25
Categorie Soggetti
Chemistry Analytical","Nuclear Sciences & Tecnology","Chemistry Inorganic & Nuclear
Journal title
Journal of radioanalytical and nuclear chemistry → ACNP
ISSN journal
02365731
Volume
185
Issue
2
Year of publication
1994
Pages
243 - 250
Database
ISI
SICI code
0236-5731(1994)185:2<243:ESOTWT>2.0.ZU;2-5
Abstract
A simple method is described for the solvent extraction of thorium. Th orium is extracted quantitatively from 5 . 10(-3)M sodium salicylate s olution at pH 2.5-3.25 using 2.16 . 10(-2)M triphenylphosphine oxide a s an extractant dissolved in toluene. The extracted metal ion is strip ped with hydrochloric acid (0.1M) and determined spectrophotometricall y with Thoron-1 at 540 nm. The method permits separation of thorium fr om lanthanum, cerium, neodymium, samarium and uranium from binary mixt ures and is applicable to the analysis of monazite sand. The method is precise, accurate and selective.