title: Determination of impurities in pesticides and their degradation products formed during the wine-making process by solid-phase extraction and gas chromatography with detection by electron impact mass spectrometry. I. Vinclozoline, procymidone and fenitrothion.
abstract: The presence of degradation products of vinclozoline, procymidone and fenitrothion, and of impurities from their commercial formulations, was studied in white and red wines elaborated from spiked must. After solid-phase extraction the nature of the residues was established by gas chromatography with mass spectrometric detection. The structures of several degradation products and impurities are discussed and elucidated on the basis of their electron impact spectra. In elaborated wines the concentrations of the degradation products and impurities are lower than those of the original active ingredients. Aminofenitrothion and acetylamino-formyl-fenitrothion-oxon are the main residues of fenitrothion in wine. For dicarboximides, an alcohol derivative of vinclozoline was found in addition to 3,5-dichloroaniline.
authors.affiliation: Department of Analytical Chemistry, Faculty of Sciences, University of Valladolid, Prado de la Magdalena s/n, 47005 Valladolid, Spain. jjimenez@qa.uva.es
authors.forename: Juan José
authors.initials: JJ
authors.lastname: Jiménez
authors.forename: José Luis
authors.initials: JL
authors.lastname: Bernal
authors.forename: M Jesús
authors.initials: MJ
authors.lastname: Del Nozal
authors.forename: Elena
authors.initials: E
authors.lastname: Arias
authors.forename: José
authors.initials: J
authors.lastname: Bernal
mesh_terms: D001643:Bridged Bicyclo Compounds / Q000032:analysis / Q000737:chemistry; D005278:Fenitrothion / Q000032:analysis / Q000737:chemistry; D005659:Fungicides, Industrial / Q000032:analysis* / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D010080:Oxazoles / Q000032:analysis / Q000737:chemistry; D010573:Pesticide Residues / Q000032:analysis* / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D014920:Wine / Q000032:analysis*
chemical_list: D001643:Bridged Bicyclo Compounds; D005659:Fungicides, Industrial; D010080:Oxazoles; D010573:Pesticide Residues; C035988:procymidone; C025643:vinclozolin; D005278:Fenitrothion