|Marek, Le Etta - MINN DEPT AGRICULTURE|
Submitted to: American Chemical Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: April 14, 1997
Publication Date: N/A
Technical Abstract: A multiresidue method for the determination of 4-methoxy-6-methyl-1,3, 5-triazin-2-yl-containing sulfonylurea herbicides in soil by high performance liquid chromatography/electrospray/mass spectrometry (LC/ES/MS) is reported. A clay loam soil spiked at 6 ppb with chlorsulfuron, metsulfuron-methyl, thifensulfuron-methyl, and triasulfuron was extracted with ammonium carbonate, and the extract cleaned up by C18-SPE. The herbicides were quantified using selected ion monitoring. Recoveries of the four herbicides ranged from 80 to 100 percent. This multiresidue method should also be appropriate for other sulfonylurea herbicides and other polar pesticides. For instance, we have also successfully used LC/ES/MS to analyze the insecticide imidacloprid and its metabolites.