RADIOCHEMICAL SEPARATION OF U-ISOTOPE AND TH-ISOTOPE IN PHOSPHATE RICH SAMPLES FOR AGE-DETERMINATION

Authors
CHOUKRI A REYSS JL TURPIN L BERRADA M
Citation
A. Choukri et al., RADIOCHEMICAL SEPARATION OF U-ISOTOPE AND TH-ISOTOPE IN PHOSPHATE RICH SAMPLES FOR AGE-DETERMINATION, Radiochimica Acta, 65(2), 1994, pp. 137-139
Citations number
13
Categorie Soggetti
Nuclear Sciences & Tecnology","Chemistry Inorganic & Nuclear
Journal title
Radiochimica Acta → ACNP
ISSN journal
00338230
Volume
65
Issue
2
Year of publication
1994
Pages
137 - 139
Database
ISI
SICI code
0033-8230(1994)65:2<137:RSOUAT>2.0.ZU;2-C
Abstract
A related radiochemical method for age determination of marine carbona te samples (corals, shells, ...) has been modified for processing phos phate samples. It is based on a single anion exchange column: U is ret ained in 8 M HCl and Th in 8 M HNO3. Th is quantitatively fixed in the latter medium provided [PO4(3-)] is < 0.1 M. Trials on real samples y ield U and Th recoveries of 75 and 85%, respectively. This method cont rasts with time-consuming procedures described in earlier works [1-5].