Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/2205
Title: Determination of Eu(III) based on fluorescence and cofluorescence enhancement of Eu(III)-Tb(III)-tetracycline-citrate system
Authors: Wang, Xiaoli
Zhao, Huichun
Jin, Linpei
Issue Date: Nov-2007
Publisher: CSIR
Series/Report no.: Int. Cl. ⁸ G01N21/64
Abstract: A new sensitized cofluorescence system has been developed for the determination of Eu(III) based on its complex formation with tetracycline (TC) in the presence of citrate and Tb(III). Eu(III) forms complex with tetracycline in alkaline condition which emits intrinsic fluorescence of Eu(III) when excited. The fluorescence intensity of Eu(III)TC is enhanced about 5 times when citrate and Tb(III) are introduced. The factors that influence the fluorescence intensity of the system have been studied in detail. Under optimum conditions, the relative fluorescence intensity is linear in over the range 6.0×10⁻⁹ to 4.0×10⁻⁶ M of Eu(III). The detection limit has been found to be 1.4×10⁻⁹ M of Eu(III). The method has been used for the determination of Eu in two rare earth samples with relative error 4.5% and -1.8%, and RSD 2.6% and 2.1%, respectively.
Description: 1801-1804
URI: http://hdl.handle.net/123456789/2205
ISSN: 0376-4710
Appears in Collections:IJC-A Vol.46A(11) [November 2007]

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