Ionic liquid based hollow fiber supported liquid phase microextraction of ultraviolet filters.
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 0.5 ng/ml. Real water samples spiked with the analytes extracted were analyzed, and yielded relative recoveries ranging from 82.6% to 105.9%.
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
Dandan
D
Ge
Hian Kee
HK
Lee
D001577:Benzophenones / Q000032:analysis / Q000302:isolation & purification; D002164:Camphor / Q000031:analogs & derivatives / Q000032:analysis / Q000302:isolation & purification; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D060766:Drinking Water / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007093:Imidazoles / Q000737:chemistry; D052578:Ionic Liquids / Q000737:chemistry*; D057230:Limit of Detection; D059627:Liquid Phase Microextraction / Q000379:methods*; D015203:Reproducibility of Results; D045483:Rivers / Q000737:chemistry; D012965:Sodium Chloride; D013473:Sunscreening Agents / Q000032:analysis / Q000302:isolation & purification*; D013995:Time; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000302:isolation & purification*
D001577:Benzophenones; D060766:Drinking Water; D007093:Imidazoles; D052578:Ionic Liquids; D013473:Sunscreening Agents; D014874:Water Pollutants, Chemical; D012965:Sodium Chloride; D002164:Camphor; C038939:enzacamene