Analytical Laboratories Method No. 4014 - Radiometric Method for the Analysis of Th-232 in U Metal.

摘要

Microgram quantities of thorium are extracted from a dissolved uranium metal sample (uranyl nitrate solution) with TTA (thenoyltrifluoroacetone) in xylene. Further removal of trace levels of uranium is accomplished by converting the thorium to thorium fluoride and extracting the uranium into trioctylphosphine oxide (TOPO) in cyclohexane. The thorium is reconverted to the nitrate ionic form and a planchet is then prepared and counted. (ERA citation 13:043574)