title: Medium-assisted non-polar solvent dynamic microwave extraction for determination of organophosphorus pesticides in cereals using gas chromatography-mass spectrometry.
abstract: A fast and green pretreatment method, medium-assisted non-polar solvent dynamic microwave extraction, was first applied to extract ten of organophosphorus pesticides (OPPs) from five cereal samples. Without adding any polar solvent, graphite powders (GP) were used as microwave absorption medium to transform microwave energy into heat energy. For recycling GP, an extractor was made by sealing GP inside the exterior tube of a glass sleeve. By dynamic microwave extraction using hexane as extraction solvent, ten OPPs could be extracted completely within 200s, and the extract was directly analysed by GC-MS without any clean-up process. The effects of some experimental parameters on extraction efficiency were investigated and optimised. Relative standard deviations of intra- and inter-day ranging from 1.02% to 5.32% were obtained. Five real samples were analysed, and the recoveries obtained were in the range of 73.2-99.8%, and the relative standard deviations were lower than 6.63%.
authors.affiliation: College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
authors.forename: Lijie
authors.initials: L
authors.lastname: Wu
authors.affiliation: College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Song
authors.affiliation: Department of Chemistry, Liaoning University, Shenyang 110036, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Xu
authors.affiliation: College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
authors.forename: Na
authors.initials: N
authors.lastname: Li
authors.affiliation: College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
authors.forename: Mingyuan
authors.initials: M
authors.lastname: Shao
authors.affiliation: College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
authors.forename: Hanqi
authors.initials: H
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
authors.forename: Aimin
authors.initials: A
authors.lastname: Yu
authors.affiliation: School of Chemical and Materials Engineering, Yanching Institute of Technology, Langfang 065201, China.
authors.forename: Cui
authors.initials: C
authors.lastname: Yu
authors.affiliation: Chinese Academy of Inspection and Quarantine, Beijing 100123, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Ma
authors.affiliation: College of Technology Center, Jilin Entry-Exit Inspection and Quarantine Bureau, Changchun 130062, China.
authors.forename: Chunmei
authors.initials: C
authors.lastname: Lu
authors.affiliation: College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China. Electronic address: wangziming@jlu.edu.cn.
authors.forename: Ziming
authors.initials: Z
authors.lastname: Wang
mesh_terms: D002523:Edible Grain / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006108:Graphite; D006586:Hexanes; D006358:Hot Temperature; D008872:Microwaves; D009943:Organophosphorus Compounds / Q000032:analysis*; D010575:Pesticides / Q000032:analysis*; D012997:Solvents
chemical_list: D006586:Hexanes; D009943:Organophosphorus Compounds; D010575:Pesticides; D012997:Solvents; C026385:n-hexane; D006108:Graphite
keywords: Cereals; Gas chromatography-mass spectrometry; Medium-assisted non-polar solvent dynamic microwave extraction; Organophosphorus pesticides