title: Simultaneous determination of multiresidual phenyl acetanilide pesticides in different food commodities by solid-phase cleanup and gas chromatography-mass spectrometry.
abstract: An efficient and sensitive multiresidue method has been developed for quantification and confirmation of 25 phenyl acetanilide pesticides in a wide variety of food commodities including maize, spinach, mushroom, apple, soybean, chestnut, tea, beef, cattle liver, chicken, fish, and milk. Analytes were extracted with acetone-n-hexane (1:2, v/v) followed by cleanup using SPE. Several types of adsorbents were evaluated. Neutral aluminum and graphitized carbon black cartridge showed good cleanup efficiency. The extract was determined by GC-MS in the selected ion monitoring mode using one target and two qualitative ions for each analyte. The limits of detection were 0.01 mg/kg for all analytes. The average recoveries ranged from 66.9 to 110.6% (mean 88.8%) and RSDs were in the range 2.0-19% (mean 10.5%) across three fortification levels. The proposed method was successfully applied to real samples in routine analysis and a satisfactory result was obtained.
authors: Inspection and Quarantine Technology Center, Hunan Entry-Exit Inspection and Quarantine Bureau of China, Changsha, China.
authors: Yongjun
authors: Y
authors: Li
authors: Meiling
authors: M
authors: Wang
authors: Hongfei
authors: H
authors: Yan
authors: Shanliang
authors: S
authors: Fu
authors: Hua
authors: H
authors: Dai
mesh_terms: D000083:Acetanilides / Q000737:chemistry* / Q000302:isolation & purification; D005638:Fruit / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D010573:Pesticide Residues / Q000737:chemistry* / Q000302:isolation & purification; D052616:Solid Phase Extraction / Q000379:methods*; D013662:Tea / Q000737:chemistry*; D014675:Vegetables / Q000737:chemistry*
chemical_list: D000083:Acetanilides; D010573:Pesticide Residues; D013662:Tea; C508827:acetanilide