A study on extraction of thorium with 1-phenyl-3-methyl-4-benzoyl-pyrazolone-5 (PMBP)-loaded polyurethane foam is described.
Open-cell polyurethane foam has proved to be effective as supporting material for PMBP. Thorium nitrate can be quantitatively
extracted by PMBP-loaded polyurethane foam over a wide pH range. The effect of equilibrium time, pH, thorium concentration,
various anions and flow-rate on the extraction efficiency of thorium is examined. A technique of extraction chromatography
column with PMBP foam cylinder has been developed for trace thorium analysis of bulky water samples.