title: Multiresidue Method for Determination of 183 Pesticide Residues in Leeks by Rapid Multiplug Filtration Cleanup and Gas Chromatography-Tandem Mass Spectrometry.
abstract: This study reports the development of a novel multiplug filtration cleanup (m-PFC) procedure for analysis of pesticide residues in leek samples followed by gas chromatography-tandem mass spectrometry detection. The leek samples were initially purified following the dispersive solid-phase extraction with different sorbents to determine the most suitable proportioning of sorbent materials; then, the m-PFC method was carried out by applying the streamlined procedure with syringes. Average recoveries of most pesticides were in the range from 70.2 to 126.0% with the relative standard deviation < 20% with the m-PFC process. The limits of detection were 0.03-3.3 μg kg(-1). The limits of quantification were 0.1-10 μg kg(-1). The m-PFC process is convenient and time-efficient, taking just a few seconds per sample. Finally, the developed method was successfully applied to the determination of pesticide residues in market samples. In that analysis, 35 pesticides were detected in 29 samples, with values ranging from 2.0 to 9353.1 μg kg(-1).
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University , Beijing 100193, People's Republic of China.
authors.forename: Nan
authors.initials: N
authors.lastname: Zou
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University , Beijing 100193, People's Republic of China.
authors.forename: Yongtao
authors.initials: Y
authors.lastname: Han
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University , Beijing 100193, People's Republic of China.
authors.forename: Yanjie
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University , Beijing 100193, People's Republic of China.
authors.forename: Yuhong
authors.initials: Y
authors.lastname: Qin
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University , Beijing 100193, People's Republic of China.
authors.forename: Kejia
authors.initials: K
authors.lastname: Gu
authors.forename: Jingru
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University , Beijing 100193, People's Republic of China.
authors.forename: Canping
authors.initials: C
authors.lastname: Pan
authors.affiliation: Institute of Pesticide & Environmental Toxicology, Guangxi University , Nanning 530005, China.
authors.forename: Xuesheng
authors.initials: X
authors.lastname: Li
mesh_terms: D005374:Filtration / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D057230:Limit of Detection; D019697:Onions / Q000737:chemistry*; D010573:Pesticide Residues / Q000737:chemistry* / Q000302:isolation & purification; D052616:Solid Phase Extraction; D053719:Tandem Mass Spectrometry / Q000379:methods
chemical_list: D010573:Pesticide Residues
keywords: MWCNTs; d-SPE; leek; m-PFC; pesticide residue analysis