Ep. Horwitz et al., DIPEX - A NEW EXTRACTION CHROMATOGRAPHIC MATERIAL FOR THE SEPARATION AND PRECONCENTRATION OF ACTINIDES FROM AQUEOUS-SOLUTION, Reactive & functional polymers, 33(1), 1997, pp. 25-36
A novel extraction chromatographic resin consisting of a liquid diphos
phonic acid supported on an inert polymeric substrate for the sorption
of actinides from strongly acidic chloride media is described. The re
sin is shown to exhibit stronger affinity for actinides in the tri-, t
etra- and hexavalent oxidation states and superior selectivity for ame
ricium(III) over aluminum(III) or iron(III) than an analogous chelatin
g ion-exchange resin containing chemically bonded geminally substitute
d diphosphonic acid functionalities. These properties, along with the
comparative ease of recovery of sorbed actinides, make the resin readi
ly applicable to the separation and preconcentration of actinides, as
a group, from complex matrices such as soils and bioassay samples.