Potentially hazardous substances in surface waters. II. Cholinesterase inhibitors in Dutch surface waters

Abstract

Several analytical methods were employed to determine the concentrations of cholinesterase inhibitors in several Dutch surface waters. An Auto-Analyzer method was used for screening purposes; thin-layer chromatography and gas-liquid chromatography-mass spectrometry were used for identification and quantitation of malathion, parathion, dimethoate, diazinon and carbaryl in extracts of the river Rhine.