Determination of sulfonylurea degradation products in soil by liquid chromatography-ultraviolet detection followed by confirmatory liquid chromatography-tandem mass spectrometry.
A method based on liquid extraction followed by sample enrichment on reversed-phase solid-phase extraction was developed for the extraction of five degradation products of four sulfonylurea herbicides (chlorsulfuron, metsulfuron-methyl, thifensulfuron-methyl and tribenuron-methyl) from soil. The compounds have been quantified by LC-UV and identified by tandem LC-MS with electrospray ionization or atmospheric pressure chemical ionization. The limits of detection for the five compounds were between 10 and 50 micrograms kg-1. The method has been applied to the extraction of soil samples after microbial degradation of sulfonylurea herbicides.
Bossi
R
R
National Environmental Research Institute, Department of Environmental Chemistry, Roskilde, Denmark. rbo@dmu.dk
Vejrup
K
K
Jacobsen
C S
CS
D002853:Chromatography, Liquid / Q000379:methods*; D006540:Herbicides / Q000032:analysis*; D013058:Mass Spectrometry; D012989:Soil Pollutants / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet; D013453:Sulfonylurea Compounds / Q000032:analysis*
D006540:Herbicides; D012989:Soil Pollutants; D013453:Sulfonylurea Compounds