LC/MS analysis of 4-methoxy-6-methyl-1,3,5-triazin-2-yl-containing sulfonylurea herbicides in soil
1996
Marek, L.J. | Koskinen, W.C.
A multiresidue method for the determination of chlorsulfuron, metsulfuron-methyl, thifensulfuronmethyl, and triasulfuron in soil by high-performance liquid chromatography/electrospray/mass spectrometry (LC/ES/MS) is reported. A clay loam soil, spiked at 6.0 micrograms kg-1 with all four herbicides, was extracted with 0.1 M ammonium carbonate, and the extract was cleaned up by C18-SPE. The herbicides were quantified using selected ion monitoring. The percent recoveries were as follows: chlorsulfuron, 80.1 - 7.9%; metsulfuron-methyl, 99.4 +/- 8.6%; thifensulfuron-methyl, 95.9 +/- 5.9%; and triasulfuron 100.5 +/- 24.3%. We have shown that we can analyze and confirm four 4-methoxy-6-methyl-1,3,5-triazin-2-yl-containing sulfonylurea herbicides in soil by LC/ES/MS. This multiresidue method should also be appropriate for other sulfonylurea and polar herbicides.
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