Summary
A rapid method for the determination of chlorinated pesticides and polychlorinated biphenyls in mussels (Mytilus sp.) is reported. The mussel sample is homogenized and extracted with acetonitrile. The organic solution is concentrated and successively diluted with distilled water solution (12 g L−1 NaCl). The organic compounds from water solution are adsorbed onto a NH2 Sep-Pak cartridge.
The clean-up step, in which the polychlorobiphenyls and chiorinated pesticides are separated in different eluates, is achieved by passing 25 mL of a 40% methanol aqueous solution through the NH2 Sep-Pak and the C18 Sep-Pak cartridges connected in series.
The polychloroblphenyls are desorbed from the NH2 Sep-Pak cartridge whilst the chlorinated peslicides are recovered from the C18 Sep-Pak cartridge.
In the separation of polychlorobiphenyls from the chlorinated pesticides tested in this work, only aldrin, hepatachlor and 4,4′-DDD are partially adsorbed with the polychlorobiphenyls onto the NH2 Sep-Pak cartridge.
The average recovery is ≥95.0% with a relative standard deviation ≤5.0%. The limits of detection for different pesticides and polychlorobiphenyl congeners are 0.01 and 0.008 μg Kg−1. The final determination is carried out by capillary gas chromatography with ECD.
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Russo, M.V. Fast solid phase extraction of polychlorobiphenyls and chlorinated pesticide residues from mussels using sep-pak cartridges. Chromatographia 51, 71–76 (2000). https://doi.org/10.1007/BF02490698
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DOI: https://doi.org/10.1007/BF02490698