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- W2056578701 abstract "A rapid multiresidue method has been developed for the analysis of 21 nitrogen containing herbicides in soil. The compounds included widely used herbicides belonging to triazines, thiocarbamates, uracils, nitroanilines, chloroacetamides and oxadiazon, a non-classified heterocycle. The method is based in the extraction by sonication of soil samples placed in small columns using a low volume of ethyl acetate. Residues were determined by gas chromatography with nitrogen–phosphorus detection. Two capillary columns, HP-1 and HP-1701, were compared and the best resolution was obtained with the HP-1 column, which was then used in the residue determination. Recovery through the method was studied in the range 0.2 to 1 μg g−1 and average recoveries varied from 89% to 109% with a relative standard deviation between 2% and 10%. The detection limit of the method ranged from 0.001 to 0.02 μg g−1 for the different herbicides. Confirmation of residue identity was performed by GC–MS in the selected-ion monitoring mode." @default.
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- W2056578701 date "1998-10-01" @default.
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- W2056578701 title "Multiresidue herbicide analysis in soil samples by means of extraction in small columns and gas chromatography with nitrogen–phosphorus and mass spectrometric detection" @default.
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- W2056578701 doi "https://doi.org/10.1016/s0021-9673(98)00293-3" @default.
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