Separation of thorium from uranium in support of particle reference material production

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

“…Beck et al investigated extraction resins for separation of Th from U for the 230 Th/ 234 U radiochronometer as a 'ngerprint' of nuclear material to support particle reference material production. 197 A double-stacked TEVA resin separation method achieved quantitative U recovery, with Th below ICP-MS detection limits, whilst 0.5% Th remained in the U fraction following UTEVA resin separation.…”