title: [Determination of carfentrazone-ethyl(F8426) residue in soil and wheat by wide-bore capillary gas chromatography].
abstract: An efficient method for determining F8426 of Affinity 40 DF in soil and wheat is described. F8426 was extracted from the soil and the wheat sample with acetone-water (80:20, volume ratio), and the extract was partitioned with petroleum ether. Then the upper layer was concentrated and cleaned up on a micro-column of Florisil and activated carbon mixture. Finally F8426 was separated from other interfering components through wide-bore capillary gas chromatographic column (OV-1701, 12 m x 0.53 mm i.d.), and was detected by electron capture detector (ECD). The lowest detection limit for F8426 was 0.02 ng. The lowest detectable concentrations in wheat and soil was 2 micrograms/kg and 1 microgram/kg respectively. The average recovery and coefficient of variation of this method were 89.60%-97.53% and 4.42%-8.67% respectively. This method is simple, sensitive and suitable for residue analysis of F8426.
authors.affiliation: Agriculture Ministry Key Laboratory of Pesticide Chemistry and Application Technology, College of Applied Chemistry, China Agricultural University, Beijing 100094, China. hlj2000@263.net
authors.forename: L J
authors.initials: LJ
authors.lastname: Han
authors.forename: C F
authors.initials: CF
authors.lastname: Qian
authors.forename: H
authors.initials: H
authors.lastname: Zhang
mesh_terms: D002849:Chromatography, Gas / Q000379:methods; D006540:Herbicides / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D014227:Triazines; D014230:Triazoles / Q000032:analysis*; D014908:Triticum / Q000737:chemistry
chemical_list: D006540:Herbicides; D010573:Pesticide Residues; D012989:Soil Pollutants; D014227:Triazines; D014230:Triazoles; C427526:carfentrazone-ethyl