title: Validation of a congener specific method for ortho and non-ortho substituted polychlorinated biphenyls in fruit and vegetable samples.
abstract: An on-line procedure has been developed and validated for the clean-up and fractionation of ortho and non-ortho-PCBs in fruit and vegetable samples. The procedure combines silica/acid and carbon/glass fibre columns with gas chromatography-mass spectrometry. Chromatography on carbon/glass fibre allowed collection of mono-ortho/di-ortho and non-ortho-PCB fractions, which were determined separately by GC-MS. The method was validated by replicate analyses and by inter-laboratory comparison of data for PCB congeners determined in fruit and vegetable samples collected in South Wales. The concurrent determination of ortho and non-ortho substituted PCBs is reported with recoveries ranging from 55-95% and a mean intra-laboratory precision (%COV) of 9.5% for apple extracts.
authors.affiliation: Department of Chemistry and Physics, Nottingham Trent University, UK.
authors.forename: D
authors.initials: D
authors.lastname: Chewe
authors.forename: C S
authors.initials: CS
authors.lastname: Creaser
authors.forename: C D
authors.initials: CD
authors.lastname: Foxall
authors.forename: A A
authors.initials: AA
authors.lastname: Lovett
mesh_terms: D002845:Chromatography / Q000379:methods / Q000706:statistics & numerical data; D004785:Environmental Pollutants / Q000032:analysis; D005506:Food Contamination / Q000032:analysis*; D005638:Fruit / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods / Q000706:statistics & numerical data; D011078:Polychlorinated Biphenyls / Q000032:analysis* / Q000737:chemistry / Q000592:standards; D012015:Reference Standards; D015203:Reproducibility of Results; D014675:Vegetables / Q000737:chemistry
chemical_list: D004785:Environmental Pollutants; D011078:Polychlorinated Biphenyls