Abstract
Conditions for the sorption of europium(III) ions by finely dispersed zirconium oxophosphate and for the formation of Eu complexes upon treatment of the resulting adsorbates with solutions of reagents (Na2WO4; oxalic, nicotinic, quinaldic, benzoic, and nalidixic acids; and benzoyltrifluoroacetone) were studied. It was found that the adsorbate of the Eu complex of nalidixic acid (the ratio of components, 1 : 2) exhibits highly intense luminescence and is characterized by the highest photostability. The use of sorption and the complexation of Eu with nalidixic acid on the sorbent improved the selectivity and lowered the detection limit for the determination of europium in high-purity samarium oxide.
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