S. Ahmad et al., SIMULTANEOUS DETERMINATION OF URANIUM AND THORIUM IN HIGH-GRADE THORIUM ORES, Journal of radioanalytical and nuclear chemistry, 170(1), 1993, pp. 165-170
A routine procedure has been developed for the simultaneous determinat
ion of uranium and thorium in high concentration thorium ores. INAA is
used to determine the uranium and thorium concentration. However, for
very low concentrations of uranium a radiochemical procedure based on
the use of NPy/benzene as an extractant has to be employed. The preci
sion and accuracy of the method has been determined by analyzing IAEA
and NBL standard thorium/uranium ores.