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Determination of chromium(III) in aqueous solution using CePO 4 :Tb 3+ nanocrystals in a fluorescence resonance energy transfer system
Author(s) -
Chen HongQi,
Wu Yong,
Zhang YiYan,
Guan YingYing,
Wang Lun
Publication year - 2014
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2599
Subject(s) - chromium , aqueous solution , detection limit , förster resonance energy transfer , fluorescence , analytical chemistry (journal) , chemistry , calibration curve , nanocrystal , linear range , materials science , nuclear chemistry , nanotechnology , chromatography , physics , optics , organic chemistry
Trivalent chromium is an essential element required for normal carbohydrate, lipid and protein metabolism in humans and animals. This article describes an efficient fluorescence resonance energy transfer (FRET) system between CePO 4 :Tb 3+ nanocrystals as the donor and chromium(III) as the acceptor. CePO 4 :Tb 3+ nanocrystals were synthesized in aqueous solution, and characterized by transmission electron microscopy. Under optimum conditions, a linear calibration graph was obtained ( R 2 = 0.996). The linear range and detection limit of chromium(III) were 0.01–2.2 μM, and 9.1 nM, respectively. The proposed method had a wide linear range and proved to be very sensitive, rapid and simple. Moreover, the method was applied successfully to the determination of chromium(III) in synthetic samples and tap water. Copyright © 2013 John Wiley & Sons, Ltd.