title: Simplified method for estimation of DDT and hexachlorocyclohexane residues in milk.
abstract: A procedure that combines acetone-hexane extraction and cleanup by treatment with concentrated sulfuric acid is described for determining DDT and 1,2,3,4,5,6-hexachlorocyclohexane (HCH) residues in milk. Recoveries from samples fortified with 0.004-0.008 ppm of different HCH isomers and 0.01-0.02 ppm DDT and its metabolites ranged from 83.4 to 99.8%. The proposed method is simple and rapid, and does not require the use of costly adsorbents.
mesh_terms: D000818:Animals; D002417:Cattle; D002849:Chromatography, Gas / Q000379:methods; D003634:DDT / Q000032:analysis*; D001556:Hexachlorocyclohexane / Q000032:analysis*; D008892:Milk / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*
chemical_list: D010573:Pesticide Residues; D001556:Hexachlorocyclohexane; D003634:DDT