TELLURIUM INTERFERENCE WITH ULTRATRACE PLATINUM ANALYSIS DURING NICKEL SULFIDE FIRE-ASSAY AND NEUTRON-ACTIVATION

Authors
MCDONALD I TREDOUX M HART RJ
Citation
I. Mcdonald et al., TELLURIUM INTERFERENCE WITH ULTRATRACE PLATINUM ANALYSIS DURING NICKEL SULFIDE FIRE-ASSAY AND NEUTRON-ACTIVATION, Journal of radioanalytical and nuclear chemistry, 198(1), 1995, pp. 169-178
Citations number
31
Categorie Soggetti
Chemistry Analytical","Nuclear Sciences & Tecnology","Chemistry Inorganic & Nuclear
Journal title
Journal of radioanalytical and nuclear chemistry → ACNP
ISSN journal
02365731
Volume
198
Issue
1
Year of publication
1995
Pages
169 - 178
Database
ISI
SICI code
0236-5731(1995)198:1<169:TIWUPA>2.0.ZU;2-J
Abstract
The determination of ultratrace concentrations of Pt in rock samples u sing nickel sulphide fire assay combined with neutron activation analy sis (NiS-NAA) is influenced by the presence of Te in the irradiated no ble metal concentrate. Interference caused by Te-123m on the 158 keV p eak of Au-199 (produced from Pt-198) is, discussed with reference to a noble metal standard (Wits-1) and sedimentary rocks which generally h ave low Pt concentrations and high Te/Pt ratios. The importance of a r igorously controlled dissolution of the fire assay button to achieve c omplete removal of Te is emphasized.