Journal of AOAC International 2001-01-01

Liquid chromatographic/mass spectrometric determination of desmedipham and phenmedipham and their metabolites in soil.

D Perret, A Gentili, S Marchese, A Marin, F Bruno

Index: J. AOAC Int. 84(5) , 1407-12, (2001)

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Abstract

A simple method is described for the simultaneous determination of residues of 2 carbamate herbicides (phenmedipham and desmedipham) and related metabolites (m-aminophenol, aniline, and m-toluidine) in soil. The analytes are extracted from spiked soils with methanol. The solvent/soil suspension is centrifuged, and the supernatant is directly injected, without any further cleanup, into a reversed-phase liquid chromatography/mass spectrometry apparatus equipped with a TurbolonSpray interface. The method was tested on 5 soils having different physicochemical properties. Recoveries from the soil types, spiked over the range of 50-200 ppb, were essentially quantitative for each analyte. The detection limits of the method are < or = 25 ng/g.