title: A multiple hollow fibre liquid-phase microextraction method for the determination of halogenated solvent residues in olive oil.
abstract: The present paper describes a method based on the extraction of analytes by multiple hollow fibre liquid-phase microextraction and detection by ion-trap mass spectrometry and electron capture detectors after gas chromatographic separation. The limits of detection are in the range of 0.13-0.67 μg kg(-1), five orders of magnitude lower than those reached with the European Commission Official method of analysis, with three orders of magnitude of linear range (from the quantification limits to 400 μg kg(-1) for all the analytes) and recoveries in fortified olive oils in the range of 78-104 %. The main advantages of the analytical method are the absence of sample carryover (due to the disposable nature of the membranes), high enrichment factors in the range of 79-488, high throughput and low cost. The repeatability of the analytical method ranged from 8 to 15 % for all the analytes, showing a good performance.
authors.affiliation: Department of Chemistry and Materials Science, Faculty of Experimental Sciences, University of Huelva, Campus de El Carmen, 21007, Huelva, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Manso
authors.forename: T
authors.initials: T
authors.lastname: García-Barrera
authors.forename: J L
authors.initials: JL
authors.lastname: Gómez-Ariza
authors.forename: A G
authors.initials: AG
authors.lastname: González
mesh_terms: D002851:Chromatography, High Pressure Liquid; D008401:Gas Chromatography-Mass Spectrometry; D054879:Halogenation; D057230:Limit of Detection; D059627:Liquid Phase Microextraction / Q000295:instrumentation* / Q000379:methods; D008567:Membranes, Artificial; D000069463:Olive Oil; D010938:Plant Oils / Q000737:chemistry*; D015203:Reproducibility of Results; D012997:Solvents / Q000032:analysis*
chemical_list: D008567:Membranes, Artificial; D000069463:Olive Oil; D010938:Plant Oils; D012997:Solvents