1. Comparison of concentrations and stereoisomer ratios of mecoprop, dichlorprop and metolachlor in Ontario streams, 2006-2007 vs. 2003-2004
- Author
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Steve Cagampan, Derek C. G. Muir, Ed Sverko, Jeff Small, Terry F. Bidleman, Perihan Binnur Kurt-Karakus, John Struger, and Liisa M. Jantunen
- Subjects
Dichlorprop ,Hydrology ,Mecoprop ,Ontario ,Herbicides ,Health, Toxicology and Mutagenesis ,Stereoisomerism ,General Medicine ,STREAMS ,Pesticide ,2-Methyl-4-chlorophenoxyacetic Acid ,Toxicology ,Pollution ,chemistry.chemical_compound ,chemistry ,Rivers ,Environmental chemistry ,Acetamides ,Stereoselectivity ,Enantiomer ,2,4-Dichlorophenoxyacetic Acid ,Metolachlor ,Surface water ,Water Pollutants, Chemical ,Environmental Monitoring - Abstract
Mecoprop, dichlorprop and metolachlor concentrations and enantiomer signatures were determined in Ontario streams in 2006-2007 and compared to results from 2003 to 2004. Median concentrations of dichlorprop and metolachlor were not significantly different between the two campaigns, but mecoprop was higher in 2006-2007. Concentrations of mecoprop and dichlorprop in Lake Ontario surface water were 1-2 orders of magnitude lower than stream averages. Enantiomer fractions (EFs) > 0.5 of mecoprop in high-concentration stream water samples during 2006-2007 were related to replacement of racemic mecoprop by single (+) enantiomer mecoprop-P after 2004. EFs
- Published
- 2009