Electrochemical Reactions of Europium in H2O-H3PO4-DTPA System

Abstract

The reduction of Eu(III) ions in phosphoric acid with or without diethylenetriamine-pentaacetic acid (DTPA) was studied by electrochemical analyses. Electrochemical reactions involved complexation and solvation processes of europium ions with DTPA species in phosphoric acid. The diffusion coefficient of Eu(III) species was determined in diffusion-flow media. The effect of the europium concentration and the solvent
on the complexation reactions was discussed. In addition to
electrochemical informations on Eu-H₃PO₄–DTPA system in solution,
spectrophotometric investigation confirms the formation of complexing
species.