title: Extraction and clean-up procedure for analysis of organochlorine pesticide residues in ethoxylated lanolin.
abstract: 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.
authors.affiliation: Departamento de Química Orgânica, Instituto de Química, Araraquara, SP, Brazil. lucipole@iq.unesp.br
authors.forename: L
authors.initials: L
authors.lastname: Polese
authors.forename: M
authors.initials: M
authors.lastname: Sannomiya
authors.forename: A P
authors.initials: AP
authors.lastname: de Olivera Sader
authors.forename: M
authors.initials: M
authors.lastname: Lúcia Ribeiro
mesh_terms: D000818:Animals; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000032:analysis*; D007809:Lanolin / Q000737:chemistry*; D010573:Pesticide Residues / Q000032:analysis*; D012756:Sheep
chemical_list: D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D010573:Pesticide Residues; D007809:Lanolin