FLUORESCENCE ENHANCEMENT OF RARE-EARTHS BY YTTRIUM AND ITS APPLICATION

Citation
Zk. Si et al., FLUORESCENCE ENHANCEMENT OF RARE-EARTHS BY YTTRIUM AND ITS APPLICATION, Analytical letters, 27(6), 1994, pp. 1183-1191
Citations number
7
Categorie Soggetti
Chemistry Analytical
Journal title
ISSN journal
00032719
Volume
27
Issue
6
Year of publication
1994
Pages
1183 - 1191
Database
ISI
SICI code
0003-2719(1994)27:6<1183:FEORBY>2.0.ZU;2-Q
Abstract
A study of the enhancement effect on the fluorescence intensity of the Eu3+-thenoyltrifluoroacetone (TTA)-cetyltri-methylammonium bromide (C TMAB) and the Dy3+ pyrocatechol-3,5-disulphonic acid (Tiron) systems b y Y3+ has been carried out. In the presence of yttrium the fluorescenc e intensity of the systems was enhanced by a factor of about 100 and 1 5, respectively. The fluorescence intensity was a linear function of t he concentration of europium or dysprosium in the range 1.0 x 10-(10)- 1.0 x 10(-8) mol dm(-3) and 8.0 x 10(-8)-9.0 x 10(-6) mol dm(-3), resp ectively. The detection limit was 1.0x 10(-11) mol dm(-3) and 1.0x 10( -10) mol dm(-3), respectively. The standard addition method was used f or the determination of europium or dysprosium in rare earth oxides an d gave satisfactory results. The mechanism of enhanced fluorescence wa s proposed.