title: Analytical methodology for screening organophosphorus pesticides in biota samples.
abstract: The use of gel permeation chromatography (GPC) and capillary gas chromatography (GC) with thermionic detection (NPD) is described as a routine methodology for the determination of organophosphorus pesticides in biota samples. Confirmatory analysis is done by capillary GC with mass spectrometry in the negative chemical ionization mode (NCI-MS). As an example, the use of GPC is described as trace-enrichment technique and clean-up to remove coextractive lipids in samples of mosquito fish Gambussia affinis collected during periods of 1987-1989 in the rice crop fields of the Ebro Delta (Spain). Recoveries of dioxathion, fenitrothion, malathion, tetrachlorvinphos, azinphos-ethyl, ronnel and coumaphos varied between 60% and 80% depending on the compound.
authors.affiliation: GSF-Institut für Okologische Chemie, Schulstrasse, Freising-Attaching, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Mansour
authors.forename: D
authors.initials: D
authors.lastname: Barcelò
authors.forename: J
authors.initials: J
authors.lastname: Albaigès
mesh_terms: D000818:Animals; D049872:Bivalvia; D002849:Chromatography, Gas; D002850:Chromatography, Gel; D003532:Cyprinodontiformes; D005618:Fresh Water / Q000737:chemistry*; D007306:Insecticides / Q000032:analysis*; D009943:Organophosphorus Compounds; D010473:Perciformes; D013030:Spain
chemical_list: D007306:Insecticides; D009943:Organophosphorus Compounds