title: Occurrence and distribution of sulfonylurea and related herbicides in central Canadian surface waters 2006-2008.
abstract: Surface water sampling in 2006-2008 measured the occurrence of sulfonylureas and related herbicides (SUs) during base flow conditions and wet weather events. Flumetsulam (29.2%), diuron (36.5%) and fomesafen (25.3%) were most frequently detected over the course of the study. Typical SU concentrations were in the low parts per trillion range; however, maximum concentrations of fomesafen (873 ng/L), linuron (856 ng/L) and diuron (2,900 ng/L) approached or exceeded 1 μg/L. The temporal trend in SUs showed a correlation with application periods. In general, detections of SUs were more frequent where rotation of row crops was more intense. Sampling during wet-weather events indicated potential for a range of SUs to be flushed into surface waters at relatively high concentrations.
authors.affiliation: Water Science and Technology Directorate, Environment Canada, Burlington, ON, Canada.
authors.forename: John
authors.initials: J
authors.lastname: Struger
authors.forename: Josey
authors.initials: J
authors.lastname: Grabuski
authors.forename: Steve
authors.initials: S
authors.lastname: Cagampan
authors.forename: Myriam
authors.initials: M
authors.lastname: Rondeau
authors.forename: Ed
authors.initials: E
authors.lastname: Sverko
authors.forename: Chris
authors.initials: C
authors.lastname: Marvin
mesh_terms: D001549:Benzamides / Q000032:analysis; D002170:Canada; D004237:Diuron / Q000032:analysis; D004784:Environmental Monitoring; D005618:Fresh Water / Q000737:chemistry*; D006540:Herbicides / Q000032:analysis*; D008044:Linuron / Q000032:analysis; D011743:Pyrimidines / Q000032:analysis; D013449:Sulfonamides / Q000032:analysis; D013453:Sulfonylurea Compounds / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D001549:Benzamides; D006540:Herbicides; D011743:Pyrimidines; D013449:Sulfonamides; D013453:Sulfonylurea Compounds; D014874:Water Pollutants, Chemical; D008044:Linuron; D004237:Diuron; C088563:fomesafen; C472634:N-(2,6-difluorophenyl)-5-methyl(1,2,4)-triazol(1,5-a)pyrimidine-2-sulfonamide