Publicação: Extraction and clean-up procedure for analysis of organochlorine pesticide residues in ethoxylated lanolin
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Elsevier B.V.
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In the present study an evaluation was made of a method for the determination of organochlorine pesticide residues in ethoxylated lanolin. Samples were homogenized with Celite, transferred to chromatographic columns, prepacked with silica gel deactivated to 10%. The pesticide elution was processed with n-hexane-dichloromethane and the concentrated eluate was analyzed using gas-liquid chromatography (GC) with electron capture detection (ECD). The composition of the elution solvent was a significant factor for the recovery of the pesticides. Mean recoveries obtained for fortified samples ranged from 87 to 94% for p,p'-DDE, dieldrin, endrin, p,p'-DDD and p,p'-DDT. Optimization of the experimental conditions resulted in a small-scale method that combines extraction and cleanup in a single step. (C) 2000 Elsevier B.V. S.A. All rights reserved.
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organochlorine pesticides, ethoxylated lanolin, gas chromatography
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Inglês
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Farmaco. Lausanne: Elsevier B.V. Sa, v. 55, n. 9-10, p. 637-640, 2000.
