title: Dissipation and residues of flumetsulam in wheat and soil.
abstract: A residue analytical method for the determination of flumetsulam in wheat and soil was developed using gas chromatography with electron capture detector (GC-ECD). The limit of detection of the analytical method was 0.001 ng, and the limit of quantification was 0.005, 0.01 mg/kg for soil and wheat grain, respectively. The mean recoveries from soil and wheat ranged from 83.85 % to 107.2 % with average relative standard deviation ranging from 1.87 % to 8.09 %. The method was successfully applied to determine the residual level and dissipation rate of flumetsulam in the soil and wheat. The half-life in soil was 23.1 days with a dissipation rate of 69 % over 35 days. At harvest time, the residue levels of flumetsulam in wheat grain and soil from high dosage plot were 0.031 and 0.045 mg/kg, respectively. The flumetsulam residues could not be detected from low dosage plot. Direct confirmation of the analyte in real samples was achieved by GC-ECD.
authors.affiliation: School of Chemical and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Chen
authors.forename: Jiye
authors.initials: J
authors.lastname: Hu
authors.forename: Tao
authors.initials: T
authors.lastname: Yang
mesh_terms: D005506:Food Contamination / Q000032:analysis; D006540:Herbicides / Q000032:analysis* / Q000737:chemistry; D008956:Models, Chemical; D010573:Pesticide Residues / Q000032:analysis / Q000737:chemistry; D011743:Pyrimidines / Q000032:analysis* / Q000737:chemistry; D018570:Risk Assessment; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry; D013449:Sulfonamides / Q000032:analysis* / Q000737:chemistry; D014908:Triticum / Q000737:chemistry*
chemical_list: D006540:Herbicides; D010573:Pesticide Residues; D011743:Pyrimidines; D012987:Soil; D012989:Soil Pollutants; D013449:Sulfonamides; C472634:N-(2,6-difluorophenyl)-5-methyl(1,2,4)-triazol(1,5-a)pyrimidine-2-sulfonamide