title: Preparation of porous aromatic framework/ionic liquid hybrid composite coated solid-phase microextraction fibers and their application in the determination of organochlorine pesticides combined with GC-ECD detection.
abstract: A novel hybrid material incorporating porous aromatic frameworks and an ionic liquid, 1-(triethoxy silyl)propyl-3-aminopropyl imidazole hexafluorophosphate, was prepared as solid-phase microextraction coating and employed for the extraction of organochlorine pesticides. Combining the advantages of porous aromatic frameworks and an ionic liquid, the fiber exhibited a high adsorption capacity for organochlorine pesticides. Under optimized experimental conditions, enhancement factors of 247-1696 were obtained with good linearity in the range of 1-500 μg L(-1). The detection limits and quantification limits were determined to be in the range of 0.11-0.29 μg L(-1) and 0.35-0.93 μg L(-1). The relative standard deviations for six replicates of organochlorine pesticides were in the range of 4.4%-7.2% and 5.7%-10.1% for one fiber and fiber-to-fiber, respectively. By coupling with a gas chromatography-electron capture detector, the novel fiber was successfully used for the determination of organochlorine pesticides in juice and milk samples with recoveries of 76.1%-121.3%.
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699#, Changchun, 130012, P. R. China. zhouwh@jlu.edu.cn jiaqiong@jlu.edu.cn.
authors.forename: Mingxue
authors.initials: M
authors.lastname: Wu
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
authors.forename: Ping
authors.initials: P
authors.lastname: Liu
authors.forename: Weihong
authors.initials: W
authors.lastname: Zhou
authors.forename: Qiong
authors.initials: Q
authors.lastname: Jia
mesh_terms: D053000:Analytic Sample Preparation Methods; D002849:Chromatography, Gas / Q000295:instrumentation*; D004583:Electrons; D006843:Hydrocarbons, Chlorinated / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification*; D052578:Ionic Liquids / Q000737:chemistry*; D057230:Limit of Detection; D008958:Models, Molecular; D008968:Molecular Conformation; D010575:Pesticides / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification*; D016062:Porosity; D052617:Solid Phase Microextraction / Q000379:methods*; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D006843:Hydrocarbons, Chlorinated; D052578:Ionic Liquids; D010575:Pesticides; D014874:Water Pollutants, Chemical