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Organochlorine pesticide residues have been extracted from samples of animal feed by a solid phase extraction clean‐up procedure using an octadecyl‐bonded column. The proposed method gave recoveries ranging from 70 to 100 % for ppb levels of the fifteeen pesticides studied. Analytes were identified by dual‐column capillary gas chromatography employing DB‐1 and DB‐1701 columns in parallel; identities were confirmed by calculation of retention indexes with the cubic spline interpolation method.
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Torreti et al. (1992) studied this question.
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