title: Identification of nanogram amounts of certain organochlorine insecticides.
mesh_terms: D005504:Food Analysis; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000032:analysis*; D008722:Methods; D008832:Microchemistry; D012987:Soil / Q000032:analysis
chemical_list: D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D012987:Soil