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A fully automated method, based on on-line solid phase extraction (SPE) then liquid chromatography with diode-array and fluorescence detection, has been developed for the trace-level determination of carbaryl and 1-naphthol, its primary transformation product, in environmental water samples. By means of rapid enrichment on a 30 mm x 4 mm i.d. 10-μm ODS pre-column, using a 10-mL water sample, before...
An automated method based on normal-phase LC has been developed for the sample clean-up of mussel extracts prior to gas chromatographic analysis of residues of chlorpyrifos, chlorpyrifos-methyl and their metabolites chlorpyrifos-methyl-oxon and 3,5,6-trichloro-2-pyridinol. Pesticides were extracted by means of a high speed blender using acetonitrile-acetone (90:10, v/v). The extract obtained was filtered...
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