title: [Determination of diflubenzuron and triflumuron residues in greasy wool by accelerated solvent extraction technique and high performance liquid chromatography].
abstract: A method for the determination of diflubenzuron and triflumuron residues in greasy wool was developed by high performance liquid chromatography (HPLC) coupled with accelerated solvent extraction (ASE). The diflubenzuron and triflumuron residues were extracted with acetonitrile saturated with n-hexane at 80 degrees C and 10.34 MPa. The extract was pretreated by a series of procedures such as freezing-lipid filtration, concentration and purification by solid-phase extraction prior to the determination with HPLC. The target analytes were separated on a Waters Atlants dC18 column (250 mm x 4.6 mm, 5 microm), gradiently eluted with acetonitrile and water as the mobile phases and detected by a photodiode array detector (DAD) at 254 nm. The linear ranges were 0.1 - 10.0 mg/L. There were good linearity between the peak areas and concentrations in the linear range for the analytes, and the correlation coefficients of diflubenzuron and triflumuron were higher than 0.9999. The limits of quantification for diflubenzuron and triflumuron were 0.05 and 0.04 mg/kg (S/N > or = 10), respectively. The method is simple, rapid, sensitive and suitable for preliminary screening of diflubenzuron and triflumuron residues in greasy wool.
authors: Ningbo Entry-Exit Inspection and Quarantine Bureau, Ningbo, China. fym1112@sina.com
authors: Yuanmu
authors: Y
authors: Fan
authors: Shaotang
authors: S
authors: Huang
authors: Xuejun
authors: X
authors: Yu
authors: Xiaojun
authors: X
authors: Gu
authors: Yajun
authors: Y
authors: Qiu
authors: Shubing
authors: S
authors: Chen
authors: Keteng
authors: K
authors: Fang
authors: Jun
authors: J
authors: Chen
mesh_terms: D000818:Animals; D001549:Benzamides / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004132:Diflubenzuron / Q000032:analysis*; D007306:Insecticides / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D012756:Sheep; D012997:Solvents / Q000032:analysis / Q000737:chemistry; D014935:Wool / Q000737:chemistry*
chemical_list: D001549:Benzamides; D007306:Insecticides; D010573:Pesticide Residues; D012997:Solvents; C023957:triflumuron; D004132:Diflubenzuron