SEPARATING BEHAVIORS OF HEAVIER RARE-EARTH-METAL IONS IN CENTRIFUGAL PARTITION CHROMATOGRAPHY WITH DI(2-ETHYLHEXYL) PHOSPHORIC-ACID

The separating behaviors of SmCl3, EuCl3, GdCl3, TbCl3, DyCl3, HoCl3, ErCl3, TmCl3, YbCl3, and LuCl3 in Centrifugal Partition Chromatography with the stationary phase containing a separator, Di (2-ethylhexyl) phosphoric acid (D2EHPA), are examined. The separation trends of these heavier rare earth metal ions were found to be almost as expected from the observations reported for the lighter rare earth metal ions. And the separator is also useful for mutal separation of these heavier rare earth metal ions.