Flow injection spectrofluorimetric determination of europium(III) based on solubilising its ternary complex with thenoyltrifluoroacetone and trioctylphosphine oxide in micellar solution

Abstract

A flow injection spectrofluorimetric method has been developed for the determination of europium(III) as its ternary complex with thenoyltrifluoroacetone and trioctylphosphine oxide in a micellar solution of nonaoxyethylene dodecyl ether (BL-9EX). This procedure is satisfactory of the determination of the europium(III) ion in the range 1.5–150 ng ml^–1 at a sampling rate of 55 per hour. The relative standard deviation was less than 1.2%. No interferences from 20-fold excesses of other rare earth ions were observed.