title: Column switching techniques in the liquid chromatographic analysis of organochlorine pesticides in milk.
abstract: A system is described for the analysis of organochlorine pesticides in milk by high-performance liquid chromatography. Sample clean-up, separation of pesticides from milk fat and quantification of both fat and pesticides are carried out on-column using column switching and backflushing techniques. The combination of liquid chromatography with electron-capture detection results in a detection limit of approximately 0.1 ppm pesticide in milk fat.
mesh_terms: D000818:Animals; D001322:Autoanalysis; D002079:Butter / Q000032:analysis; D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation*; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000032:analysis*; D008892:Milk / Q000032:analysis*
chemical_list: D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D002079:Butter