title: Analytical method for dimethenamid-P in selected raw agricultural commodities by gas chromatography with electron capture detection.
abstract: A sensitive and simple method for the extraction and quantification of the herbicide dimethenamid-P from several raw agricultural commodities (RAC) is presented. The method provides sensitive and well-defined chromatography with baseline resolution in all matrixes tested. Homogenized samples were extracted with methanol-water, filtered, and then extracted with hexanes. A Florisil solid-phase extraction was then applied for the final cleanup. Sample separation and quantification were performed by gas chromatography with an electron capture detector. The instrument detection limit was 0.007 microg/mL, and the practical quantification limit was 0.003 microg/g (w/w) based on a 25 g sample. Recoveries for a series of fortified plant tissues ranged from 69 to 103%. The study demonstrated selective and sensitive recovery of dimethenamid-P from the RAC tested.
authors.affiliation: Oregon State University, Environmental and Molecular Toxicology Department, Food Safety and Environmental Stewardship Program, 1007 Agricultural Life Sciences Bldg, Corvallis, OR 97331-7301, USA. kim.anderson@orst.edu
authors.forename: Kim A
authors.initials: KA
authors.lastname: Anderson
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Basile
authors.forename: Eugene R
authors.initials: ER
authors.lastname: Johnson
mesh_terms: D000083:Acetanilides / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods*; D006540:Herbicides / Q000032:analysis*; D012680:Sensitivity and Specificity; D014675:Vegetables / Q000737:chemistry*
chemical_list: D000083:Acetanilides; D006540:Herbicides; C120861:dimethenamid