Analytical method for dimethenamid-P in selected raw agricultural commodities by gas chromatography with electron capture detection

J AOAC Int. 2005 Sep-Oct;88(5):1428-32.


A sensitive and simple method for the extraction and quantification of the herbicide dimethenamid-P from several raw agricultural commodities (RAC) is presented. The method provides sensitive and well-defined chromatography with baseline resolution in all matrixes tested. Homogenized samples were extracted with methanol-water, filtered, and then extracted with hexanes. A Florisil solid-phase extraction was then applied for the final cleanup. Sample separation and quantification were performed by gas chromatography with an electron capture detector. The instrument detection limit was 0.007 microg/mL, and the practical quantification limit was 0.003 microg/g (w/w) based on a 25 g sample. Recoveries for a series of fortified plant tissues ranged from 69 to 103%. The study demonstrated selective and sensitive recovery of dimethenamid-P from the RAC tested.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acetanilides / analysis*
  • Chromatography, Gas / methods*
  • Herbicides / analysis*
  • Sensitivity and Specificity
  • Vegetables / chemistry*


  • Acetanilides
  • Herbicides
  • dimethenamid