Validation of a congener specific method for Ortho and non- Ortho substituted polychlorinated biphenyls in fruit and vegetable samples

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 allo...

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Bibliographic Details
Published in:Chemosphere (Oxford) 1997-10, Vol.35 (7), p.1399-1407
Main Authors: Chewe, D., Creaser, C.S., Foxal, C.D., Lovett, A.A.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Chromatography - methods
Chromatography - statistics & numerical data
Environmental Pollutants - analysis
Food Contamination - analysis
Food industries
Fruit - chemistry
Fundamental and applied biological sciences. Psychology
Gas Chromatography-Mass Spectrometry - methods
Gas Chromatography-Mass Spectrometry - statistics & numerical data
General aspects
Miscellaneous
Polychlorinated Biphenyls - analysis
Polychlorinated Biphenyls - chemistry
Polychlorinated Biphenyls - standards
Reference Standards
Reproducibility of Results
Vegetables - chemistry
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Summary: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 intea-laboratory precision (%COV) of 9.5% for apple extracts.
ISSN:0045-6535
1879-1298
DOI:10.1016/S0045-6535(97)00235-X