Selektive extraction of transplutonium and rare earth elements by trioctylphosphine oxide

In the studies of nuclear reactions of heavy ions with heavy nuclei it is often necessary to determine the yields of TPE. Trioctylphosphine oxide (TOPO) has a high selectivity towards trivalent TPE and rare earths. The possibility to use target of catcher metals as salting-out agents in the extraction of TPE with TOPO from solutions containing DTPA and lactic acid was studied. The influence of the concentration of Pb, Bi, Cu, Ni, nitric acid and TOPO on the distribution coefficients was determined. The advantage of application of the method for the extraction chromatographic separation of TPE and rare earths from other elements produced in the interaction of ions with heavy elements are shown