title: Use of a particle beam interface combined with mass spectrometry/negative chemical ionization to determine polar herbicide residues in soil by liquid chromatography.
abstract: The use of mass spectrometry/negative chemical ionization (MS/NCI), in combination with selected-ion monitoring, allows sensitive and selective determination of polar and thermally unstable herbicide residues by liquid chromatography coupled to a particle beam interface. The method has been applied to the analysis of soil samples for herbicide residues, using various procedures for their extraction and employing matrix-standard calibration to avoid quantitative errors due to transfer of matter through the interface. Data for the fragment ions found in the MS/NCI procedure and chromatograms from analyses of real samples are also presented.
authors.affiliation: University of Valladolid, Faculty of Sciences, Department of Analytical Chemistry, Spain.
authors.forename: J J
authors.initials: JJ
authors.lastname: Jiménez
authors.forename: J L
authors.initials: JL
authors.lastname: Bernal
authors.forename: M J
authors.initials: MJ
authors.lastname: del Nozal
authors.forename: M T
authors.initials: MT
authors.lastname: Martín
mesh_terms: D002853:Chromatography, Liquid / Q000379:methods*; D006540:Herbicides / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D013058:Mass Spectrometry / Q000379:methods*; D012680:Sensitivity and Specificity; D012821:Silanes; D012987:Soil / Q000032:analysis*; D012997:Solvents
chemical_list: D006540:Herbicides; D012821:Silanes; D012987:Soil; D012997:Solvents; C024779:octadecylsilane