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Reversed-phase liquid chromatography (LC) is used to determine a relatively new sulfonylureic herbicide, imazosulfuron, 1-(2-chloroimidazo-[1,2-a] pyridin-3-ylsulfonyl)-3-(4,6-dimethoxy-2-pyrimidinyl)-urea (TH-913), in drinking water and in soil. TH-913 is extracted from water using solid-phase extraction on C18 bonded silica. Soil samples (20 g) are extracted with 300 ml of methanol-water (50:50) and the acidified extracts are transferred onto Sep-Pak C18 and processed as described for water samples. Off-line desorption is done with 20 ml of methanol-water (50:50). The eluate is evaporated to dryness, the residue dissolved in acetonitrile and analysed by LC with UV detection at 238 nm. The recoveries of TH-913 from water were over 95% (at 0.05 μg/l level) and from soil over 90% (at 0.005 mg/kg level). Copyright (C) 1999 Elsevier Science B.V.




Ventriglia, M., Restani, P., Morrica, P., David, P., De Angelis, L., & Galli, C. L. (1999, October 1). Liquid chromatographic determination of imazosulfuron in drinking water and in soil using ultraviolet detection. Journal of Chromatography A. https://doi.org/10.1016/S0021-9673(99)00730-X

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