title: Pesticide trace analysis using solid-phase extraction and gas chromatography with electron-capture and tandem mass spectrometric detection in water samples.
abstract: Gas chromatography (GC) with electron-capture detection (ECD), mass spectrometry (MS) and tandem mass spectrometry (MS-MS) were employed for the identification of 12 pesticides in water samples. For this purpose, a solid-phase extraction procedure with C18 cartridges was used, optimising the breakthrough volume and the saturation concentration. In GC-MS-MS, the lowest detectable concentrations for the pesticides were between 2 and 26 ng l(-1), recoveries ranged from 70 to 133% in water samples spiked at 100 ng l(-1) and the relative standard deviations were in the range 5.3 to 17.4%. The proposed analytical methodology was applied to analyse pesticides in wetland samples from Almería (Spain).
authors.affiliation: Department of Analytical Chemistry, Faculty of Experimental Sciences, University of Almería, Spain. jlmartin@ualm.es
authors.forename: J L
authors.initials: JL
authors.lastname: Martínez Vidal
authors.forename: M C
authors.initials: MC
authors.lastname: Espada
authors.forename: A G
authors.initials: AG
authors.lastname: Frenich
authors.forename: F J
authors.initials: FJ
authors.lastname: Arrebola
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D010575:Pesticides / Q000032:analysis*; D012680:Sensitivity and Specificity; D014867:Water / Q000032:analysis*
chemical_list: D010575:Pesticides; D014867:Water