title: Analytical method for the determination of atrazine and its dealkylated chlorotriazine metabolites in water using gas chromatography/mass selective detection.
abstract: A multiresidue method is reported for the determination of atrazine and its dealkylated chlorotriazine metabolites in water. Water samples are buffered to pH 10 and partitioned in ethyl acetate. Final analysis is accomplished using gas chromatography/mass selective detection (GC/MSD) in the selected ion monitoring (SIM) mode. The limit of detection (LOD) is 0.050 ng and the limit of quantification (LOQ) is 0.10 ppb for 2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine (atrazine), 2-amino-4-chloro-6-(isopropylamino)-s-triazine (G-30033), 2-amino-4-chloro-6-(ethylamino)-s-triazine (G-28279), and 2, 4-diamino-6-chloro-s-triazine (G-28273). The mean procedural recoveries were 90, 92, 98, and 85% and the standard deviations were 12, 13, 16, and 20% for atrazine, G-30033, G-28279, and G-28273, respectively (n = 30). The study was conducted under U.S. EPA FIFRA Good Laboratory Practice Guidelines 40 CFR 160 for method validation. The reported procedure accounts for residues of G-28273 in water that are not included in EPA Method 507.
authors.affiliation: Development Resources/Chemical Support Department, Novartis Crop Protection, Inc., Greensboro, North Carolina 27419, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Yokley
authors.forename: M W
authors.initials: MW
authors.lastname: Cheung
mesh_terms: D001280:Atrazine / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D003640:Dealkylation; D008401:Gas Chromatography-Mass Spectrometry; D006540:Herbicides / Q000032:analysis*; D007202:Indicators and Reagents; D012015:Reference Standards; D014867:Water / Q000032:analysis*
chemical_list: D006540:Herbicides; D007202:Indicators and Reagents; D014867:Water; D001280:Atrazine