title: Design and optimization of a teflon helix continuous liquid-liquid extraction apparatus and its application for the analysis of organophosphate pesticides in water.
mesh_terms: D001322:Autoanalysis / Q000295:instrumentation; D007306:Insecticides / Q000032:analysis*; D008722:Methods; D009943:Organophosphorus Compounds; D014835:Volatilization; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D007306:Insecticides; D009943:Organophosphorus Compounds; D014873:Water Pollutants; D014874:Water Pollutants, Chemical