Simultaneous spectrofluorimetric determination of the rare earths with calcein

被引：18
作者：
Berregi, I [1 ]
Durand, JS
Casado, JA
机构：
[1] Univ Basque Country, Fac Chem, Unity Analyt Chem, Donostia San Sebastian 20009, Spain
[2] Univ Nacl Educ Distancia, Fac Sci, Dept Analyt Chem, Madrid 28040, Spain
来源：
TALANTA | 1999年 / 48卷 / 03期
关键词：
calcein; fluorexon; rare earths; spectrofluorimetry;
D O I：
10.1016/S0039-9140(98)00296-3
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The reactivity of the fluorescent reagent calcein with the trivalent cations of the rare earths has been spectrofluorimetrically studied in aqueous solution. Optimum excitation and emission wavelengths were 492-497 and 519-522 nm, respectively. Optimum pH was in the range 6.0-9.2. The stoichiometry of the complexes was 1:1. A direct, rapid and sensitive method for the determination of rare earth mixtures has been proposed with a detection limit of 4.49 x 10(-8) M and a coefficient of variation of 0.82%. (C) 1999 Elsevier Science B.V. All rights reserved.
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收藏
页码：719 / 728
页数：10
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