Analysis of flufenacet in soil, wheat grain and straw by gas chromatography

An analytical procedure for detecting residues of a new herbicide, flufenac et, in soil, wheat grain and straw by gas chromatographic method using vari ous solvents and extraction methods was standardized. The best results were obtained when samples fortified with flufenacet and were extracted with ac etone-0.2 M HCl (95:5) using a horizontal shaker for soil and Soxhlet extra ctor for plant samples. The clean up was done by partitioning with dichloro methane. The GC equipped with an electron-capture detector and a column pac king of HP-1 as stationary phase and nitrogen as a carrier gas at a flow-ra te of 15 mi min(-1) was used. Temperatures of oven, injector and detector w ere adjusted at 190, 210 and 270 degrees C, respectively. The retention tim e of flufenacet was 2.07 min. The herbicide recoveries ranged between 81 to 100% from the three matrices. (C) 2000 Elsevier Science B.V. All rights re served.