title: Determination of a metabolite of the herbicide pyridate in drinking and groundwater using high-performance liquid chromatography with amperometric detection.
abstract: The main metabolite of the herbicide pyridate is 3-phenyl-4-hydroxy-6-chlorpyridazine (CL9673). A high-performance liquid chromatographic method with amperometric detection is described for determining CL9673 at residue levels in water samples. Sample preconcentration is performed by passage through a C18 extraction cartridge. A recovery study using tap water samples spiked with CL9673 at a concentration of 0.1 micrograms/l showed a recovery of 84.8% (coefficient of variation 6.2%). The method is suitable for the determination of CL9673 in drinking and groundwater.
authors.affiliation: Okolab, Gesellschaft für Umweltanalytik, Vienna, Austria.
authors.forename: A
authors.initials: A
authors.lastname: Pachinger
authors.forename: E
authors.initials: E
authors.lastname: Eisner
authors.forename: H
authors.initials: H
authors.lastname: Begutter
authors.forename: H
authors.initials: H
authors.lastname: Klus
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004326:Drinking; D006540:Herbicides / Q000032:analysis / Q000378:metabolism*; D011724:Pyridazines / Q000032:analysis* / Q000378:metabolism*; D014867:Water / Q000737:chemistry*
chemical_list: D006540:Herbicides; D011724:Pyridazines; D014867:Water; C073449:CL 9673; C043100:pyridate