title: Multiresidue method for the chromatographic determination of triazine herbicides and their metabolites in raw agricultural products.
abstract: A method is described for the determination of 19 triazine herbicides and 4 metabolites in 6 agricultural products that represent diverse matrixes. In addition, a modification of this method to determine the more water-soluble metabolite, desethyldesisopropylatrazine, is described. In both these procedures, residues are extracted with methanol, and the product coextractives are removed using solvent partition and cation-exchange solid-phase extraction chromatography. A nitrogen phosphorus detector and DB-17 megabore column are used for the temperature-programmed chromatographic determination of samples fortified at 0.02-1.0 ppm levels. Average recoveries ranged from 81.1 to 106.2% for the parent herbicides and from 59.6 to 87.5% for the metabolites on all crops. An average recovery of 101.1% was obtained for desethyldesisopropylatrazine.
authors.affiliation: U.S. Food and Drug Administration, SE Regional Laboratory, Atlanta, GA 30309, USA.
authors.forename: J R
authors.initials: JR
authors.lastname: Pardue
mesh_terms: D000818:Animals; D002849:Chromatography, Gas / Q000379:methods*; D005638:Fruit / Q000737:chemistry*; D006540:Herbicides / Q000032:analysis* / Q000378:metabolism; D008892:Milk / Q000737:chemistry*; D010573:Pesticide Residues / Q000032:analysis*; D014227:Triazines; D014908:Triticum / Q000737:chemistry*; D014675:Vegetables / Q000737:chemistry*
chemical_list: D006540:Herbicides; D010573:Pesticide Residues; D014227:Triazines