title: [Determination of trifluralin residue in aquatic products and edible oils by gas chromatography-negative chemical ionization mass spectrometry].
abstract: A confirmatory method was established for the determination of trifluralin residue in aquatic products and edible oils with the technique of offline disperse solid phase extraction and gas chromatography-negative chemical ionization mass spectrometry (DSPE-GC-MS/NCI). Trifluralin was extracted from aquatic products and edible oils with acetonitrile, and liquid-liquid partitioning formed by adding anhydrous magnesium sulfate followed by a simple cleanup step known as dispersive solid-phase extraction. The aliquot was analyzed by GC-MS/NCI using isotope internal standard method. The method was reliable and stable. The recoveries of trifluralin were in the range from 80% to 100% at three spiked levels of 1.0, 2.0, and 3.0 microg/kg, and the RSDs were not more than 10.3%. The linearity of method was good from 1 to 40 microg/L, and the LOD was 0.02 microg/kg. This method can be used as a conclusive evidence method for the determination of trifluralin residue in aquatic products and edible oils.
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.forename: Guanghui
authors.initials: G
authors.lastname: Xia
authors.forename: Weijian
authors.initials: W
authors.lastname: Shen
authors.forename: Bin
authors.initials: B
authors.lastname: Wu
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.forename: Huiyuan
authors.initials: H
authors.lastname: Lu
authors.forename: Chongyu
authors.initials: C
authors.lastname: Shen
authors.forename: Zengyun
authors.initials: Z
authors.lastname: Zhao
mesh_terms: D005506:Food Contamination / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D009821:Oils / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D017747:Seafood / Q000032:analysis; D052616:Solid Phase Extraction; D014274:Trifluralin / Q000032:analysis*
chemical_list: D009821:Oils; D010573:Pesticide Residues; D014274:Trifluralin