FLUOROMETRIC-DETERMINATION OF EUROPIUM OVER A LARGE DYNAMIC-RANGE USING ITS TERNARY COMPLEX WITH THENOYLTRIFLUOROACETONE AND TRIOCTYLPHOSPHINE OXIDE IN A MICELLAR SOLUTION OF TRITON X-100

Citation
N. Arnaud et J. Georges, FLUOROMETRIC-DETERMINATION OF EUROPIUM OVER A LARGE DYNAMIC-RANGE USING ITS TERNARY COMPLEX WITH THENOYLTRIFLUOROACETONE AND TRIOCTYLPHOSPHINE OXIDE IN A MICELLAR SOLUTION OF TRITON X-100, Analyst, 122(2), 1997, pp. 143-146
Citations number
20
Categorie Soggetti
Chemistry Analytical
Journal title
ISSN journal
00032654
Volume
122
Issue
2
Year of publication
1997
Pages
143 - 146
Database
ISI
SICI code
0003-2654(1997)122:2<143:FOEOAL>2.0.ZU;2-4
Abstract
The composition of the europium-thenoyltrifluoroacetone (TTA)-trioctyl phosphine (TOPO) chelate in water in the presence of Triton X-100 was investigated. The stoichiometric composition was found to be Eu(TTA)(3 )(TOPO)(2), but different compositions can occur depending on the rela tive concentrations of the ligands, The fluorescence properties of the ternary complex were examined and optimum experimental conditions wer e defined for the determination of europium over a wide range of conce ntrations. The fluorescence intensity was a linear function of europiu m concentration over six decades extending from 10(-11) to 10(-5) mol l(-1) with a detection limit of 6 x 10(-12) mol l(-1).