Lanthanide (III) and Actinide (III) Chelate Kinetics Via Solvent Extraction.

摘要

A method has been developed to study reactions whose half-lives are on the order of seconds to minutes for which fast-reaction relaxation techniques are not suitable and classical techniques are too slow. The technique of solvent extraction was adapted in a modified version of ligand exchange. A solvent extraction agent absorbed onto a hydrophobic solid support removes radioactive cations from an aqueous phase. The solid support prevents the formation of emulsions which form at the near neutral pH's used. Removal of filtered aliquots provides data on the rate of extraction which is a function of the decomposition rate of the complex,its formation rate,and the extraction rate of the cation. The Eu(EDTA) chelate was studied. (ERA citation 03:012883)