title: Rapid pesticide analysis, in post-harvest plants used as animal feed, by low-pressure gas chromatography-tandem mass spectrometry.
abstract: A wide range of pesticides used to control pests in vegetables have been determined in agricultural plant waste from beans, watermelons, and melons grown in greenhouses located in a predominantly agricultural area in Southeast Spain (Almería). Analysis of the pesticides was carried out by low-pressure gas chromatography (LP-GC) with mass spectrometry in tandem (MS-MS) mode, after extraction of the lyophilized samples with dichloromethane. The influence of the sample matrix on the analysis was avoided by use of matrix-matched standards. Linearity, detection limit ( LOD), quantitation limit ( LOQ), recovery, and precision for each pesticide were calculated. The most frequently encountered pesticides were endosulfan (>73% of the analyzed samples) and buprofezin (>55% of the samples), followed by cypermethrin, pirimifos-methyl, bifentrin, and chlorpyrifos (>30% of the samples). The pesticide found at the highest concentration level was endosulfan (223.33 mg kg(-1)) in a watermelon sample.
authors.affiliation: Department of Analytical Chemistry, University of Almería, 04071, Almería, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Garrido-Frenich
authors.forename: F J
authors.initials: FJ
authors.lastname: Arrebola
authors.forename: M J
authors.initials: MJ
authors.lastname: González-Rodríguez
authors.forename: J L Martínez
authors.initials: JL
authors.lastname: Vidal
authors.forename: N Mora
authors.initials: NM
authors.lastname: Díez
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D002138:Calibration; D029773:Citrullus / Q000737:chemistry; D028462:Cucumis / Q000737:chemistry; D004785:Environmental Pollutants / Q000032:analysis; D007887:Fabaceae / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D010575:Pesticides / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010944:Plants / Q000737:chemistry*; D011312:Pressure; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013030:Spain; D013997:Time Factors
chemical_list: D004785:Environmental Pollutants; D010575:Pesticides