Abstract
The interphase distribution of microamounts of nitrates and perchlorates of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu between aqueous solutions of NH4NO3 or NH4ClO4 and solutions of a phosphorylated podand [Ph2P(O)CH2CH2OCH2CH2]2NBu in dichloroethane was studied. The stoichiometry of extracted complexes was determined. The efficiency of metal ion transfer to an organic phase was considered as affected by HClO4, HNO3, and HCl concentrations in the aqueous phase and by the nature of the organic solvent. The test compounds have higher extraction capacities with respect to metal ions than neutral monodentate organophosphorus compounds.
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