A Rapid Method for the Determination of Organochlorine, Pyrethroid Pesticides and Polychlorobiphenyls in Fatty Foods Using GC with Electron Capture Detection |
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Authors: | Zdenka Cenci? Kodba Darinka Brodnjak Von?ina |
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Institution: | (1) Environmental Protection Institute, Institute of Public Health Maribor, Prvomajska 1, 2000 Maribor, Slovenia;(2) Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia |
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Abstract: | A new, single-step extraction and purification method was developed for the separation of 26 organochlorine pesticides (OCPs),
three pyrethroid pesticides (PPs) and six polychlorinated biphenyls (PCBs) from fatty foods of either animal or vegetable
origin. The method includes homogenisation of extracted fat and diatomaceous earth. Separation was achieved using a mini Pasteur
pipette where a matrix solid-phase dispersion extraction was carried out with only 5 mL of dimethyl sulphoxide as an eluting
solvent. A Pasteur pipette was joined to a prepacked slurry filled Florisil column, water deactivated to 15% where a liquid–liquid
extraction and adsorption chromatography successively took place. The elution of OCPs, PPs and PCBs was performed with n-hexane/diethyl ether. Recoveries for PCBs were from 81 to 86% and for OCPs 68 to 94%, except for β-HCH, which gave lower, more variable recoveries. Excellent recoveries were obtained for pyrethroid pesticides, mostly more
than 80%. The method was applied to 509 fatty samples for monitoring of these compounds. GC, with two columns connected to
two electron capture detectors (ECD), was used. |
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Keywords: | Gas chromatography Food analysis Organochlorine compounds Pyrethroids |
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