The choice of organic reagent in reversed-phase systems for dynamic solid phase extraction of rare earth elements

Abstract

The sorption of various beta-diketones (acetylacetone, 1-phenyl-3-methyl-4-benzoylpyrazol-5-one,
thenoyltrifluoroacetone, pivaloyltrifluoroacetone) – reagents forming stable complexes with rare earth
elements (REE), – was studied on different low-polarity sorbents (hexadecylsilica, hyper cross-linked
polystyrene, polyvinylidene difluoride, activated carbon, non-porous carbon) in dynamic conditions. Reagent
distribution coefficients and dynamic capacity of sorbents for each reagent were evaluated. The elution of
reagents was studied. The comparative evaluation of modified and impregnated sorbents was carried out.
Recommendations on the choice of reagent for dynamic solid phase extraction of rare earth elements in
reserved-phase system were given