標題: Microwave-assisted sensing of tetracycline using europium-sensitized luminescence fibers as probes
作者: Kuong, Chi-Lap
Yu, Tsai-Jung
Chen, Yu-Chie
應用化學系
Department of Applied Chemistry
關鍵字: Europium;Tetracycline;Luminescence;Microwave heating
公開日期: 1-Nov-2009
摘要: In this paper, we describe a facile approach-using silicate fibers immobilized with Eu(III) ions [Eu(III) fibers] as affinity probes-to rapidly sense tetracycline (TC) in complex samples. The fabrication of the Eu(III) fibers is straightforward: Simply immerse a silicate fiber into a glass tube containing Eu(III) and irradiate with microwaves (power, 900 W) for 30 s. The Eu(III) fibers selectively trap TC from aqueous samples via chelation of the beta-diketone functional group of TC with the Eu(III) center. Because the Eu(III)-TC complexes on the fibers are luminescent, as a result of intermolecular energy transfer from the TC moieties to the Eu(III) centers, they can be detected directly using a fluorophotometer. To accelerate the sensing process, we also used microwave irradiation (for only 15 s) to trap the TC molecules from the sample solutions onto the Eu(III) fibers. Furthermore, only a small volume (< 10 mu L) of sample solution is required for these analyses. This approach allows TC to be detected in aqueous samples, with a detection limit of 50 nM.
URI: http://dx.doi.org/10.1007/s00216-009-3106-0
http://hdl.handle.net/11536/6482
ISSN: 1618-2642
DOI: 10.1007/s00216-009-3106-0
期刊: ANALYTICAL AND BIOANALYTICAL CHEMISTRY
Volume: 395
Issue: 5
起始頁: 1433
結束頁: 1439
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