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Title: Ionic liquid based hollow fiber supported liquid phase microextraction of ultraviolet filters
Authors: Ge, D.
Lee, H.K. 
Keywords: Hollow fiber supported liquid phase microextraction
Ionic liquid
UV filters
Water analysis
Issue Date: 16-Mar-2012
Citation: Ge, D., Lee, H.K. (2012-03-16). Ionic liquid based hollow fiber supported liquid phase microextraction of ultraviolet filters. Journal of Chromatography A 1229 : 1-5. ScholarBank@NUS Repository.
Abstract: Hollow fiber protected liquid phase microextraction using an ionic liquid as supported phase and acceptor phase (IL-HF-LPME) is proposed for the determination of four ultraviolet (UV) filters (benzophenone, 3-(4-methylbenzylidene)-camphor, 2-hydroxy-4-methoxybenzophenone and 2,4-dihydroxybenzophenone) in water samples for the first time. In the present study, four different ILs 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate) [HMIM][FAP], 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate [BMPL][FAP], 1-butyl-3-methylimidazolium phosphate ([BMIM][PO 4]) and 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF 6]) were evaluated as extraction solvent. Only [HMIM][FAP] showed high chemical affinity to the analytes which permits a selective isolation of the UV filters from the sample matrix, allowing also their preconcentration. IL-HF-LPME and high performance liquid chromatography provides repeatability from 1.1% to 8.2% and limits of detection between 0.3 and 0.5ng/ml. Real water samples spiked with the analytes extracted were analyzed, and yielded relative recoveries ranging from 82.6% to 105.9%. © 2012 Elsevier B.V.
Source Title: Journal of Chromatography A
ISSN: 00219673
DOI: 10.1016/j.chroma.2011.12.110
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