title: Evaluation of gas chromatography-tandem quadrupole mass spectrometry for the determination of organochlorine pesticides in fats and oils.
abstract: A gas chromatography-tandem quadrupole mass spectrometry multi-residue method for the analysis of 19 organochlorine pesticides in fats and oils has been developed. Gel permeation chromatography was employed to remove lipid material prior to GC-MS/MS analysis. Average recoveries of the pesticides spiked at 10 and 50 microg kg(-1) into fish oil, pork fat, olive oil and hydrogenated vegetable oil were typically in the range 70-110% with relative standard deviations generally less than 10%. Calculated limits of detection are between 0.1 and 2.0 microg kg(-1) and results obtained for the analysis of proficiency test materials are in good agreement with assigned values. The higher selectivity of the GC-MS/MS compared to electron capture detection and GC-MS in selective ion monitoring mode allowed unambiguous identification and confirmation of all the target pesticides at low microg kg(-1) levels in fats and oils in a single analysis.
authors.affiliation: Central Science Laboratory, Sand Hutton, York YO41 1LZ, UK.
authors.forename: Katan
authors.initials: K
authors.lastname: Patel
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Fussell
authors.forename: Mike
authors.initials: M
authors.lastname: Hetmanski
authors.forename: David M
authors.initials: DM
authors.lastname: Goodall
authors.forename: Brendan J
authors.initials: BJ
authors.lastname: Keely
mesh_terms: D005223:Fats / Q000737:chemistry*; D005395:Fish Oils / Q000737:chemistry*; D005506:Food Contamination / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis* / Q000302:isolation & purification; D010938:Plant Oils / Q000737:chemistry*; D012680:Sensitivity and Specificity
chemical_list: D005223:Fats; D005395:Fish Oils; D006843:Hydrocarbons, Chlorinated; D010938:Plant Oils