Wheat flucarbazone-sodium

Stable in neutral to basic aqueous solution Unstable in acidic aqueous solution Flucarbazone-sodium is a post-emergent grass herbicide for use in winter wheat and spring wheat, including... 

Wheat samples are extracted with dilute ammonia on the ASE200. The extracts are amended with isotopically labeled internal standards. The extracts are purified by sequential octadecyl reversed-phase solid-phase extraction (Cig SPE) and ethylenediamine-iV-propyl anion exchange (PSA) SPE. The samples are analyzed by LC/MS/MS. This method determines crop residues of flucarbazone-sodium and A-desmethyl flucarbazone with a limit of quantitation (LOQ) of 0.01 mgkg for each analyte. 

Because acceptable recoveries were obtained at O.Olmgkg", the method LOQ is 0.01 mg kg for flucarbazone-sodium and O.Olmgkg" for Af-desmethyl flucarbazone in all wheat samples. Linearity curves in both solvent and matrix blanks were mn from 0.005 to 0.100 mg kg . Because 0.005 mg kg of each analyte was reliably detected, the method limit of detection (LOD) was 0.005 mg kg in all wheat samples. 

Another example found in herbicides is the ALS inhibitor flucarbazone-sodium (Everest ) [87]. This postemergence wheat herbicide controls grass weeds, as well as a number of broadleaf weeds of commercial significance. 

The first examples of the new herbicidal dass of sulfonylaminocarbonyl-triazolinones (SACTs) were reported in 1989 [1]. Following intensive chemical optimization two representatives were developed and commerdalized for selective weed control in cereals. In 2000, flucarbazone-sodium (1) was introduced in the Canadian market under the trade name Everest for the control of wild oats Avenafatua) and green foxtail Setaria viridis) in spring wheat Triticum aestivum) and durum wheat (Triticum durum) (Fig. 2.6.1). 

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