title: Poly(ionic liquid) immobilized magnetic nanoparticles as new adsorbent for extraction and enrichment of organophosphorus pesticides from tea drinks.
abstract: New poly(ionic liquid) immobilized magnetic nanoparticles (PIL-MNPs) were synthesized via co-polymerization of 1-vinyl-3-hexylimidazolium-based ionic liquid and vinyl-modified magnetic particles and were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and magnetic measurements. The PIL-MNPs were utilized as adsorbent phases in magnetic solid-phase extraction (MSPE). The extraction and enrichment efficiency were evaluated by using four organophosphorus pesticides (parathion, fenthion, phoxim and temephos) as test analytes. Various parameters, such as amount of adsorbent, adsorption time, desorption solvent and time, and ionic strength were investigated. The proposed method showed good linearity for the analytes in the concentration range of 1-200μgL(-1) with a correlation coefficient (R)>0.9963. Low limit of detection of 0.01μgL(-1) and high enrichment factors ranging from 84 to 161 were achieved. The proposed method has been successfully used to determine organophosphorus pesticides from three tea drink samples with satisfactory recovery of 81.4-112.6% and RSDs of 4.5-11.3%. The PIL-MNP adsorbent can be reused for 20 times without a noticeable decrease in extraction efficiency.
authors.affiliation: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Zheng
authors.affiliation: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China. Electronic address: lijunhe@haut.edu.cn.
authors.forename: Lijun
authors.initials: L
authors.lastname: He
authors.affiliation: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
authors.forename: Yajing
authors.initials: Y
authors.lastname: Duan
authors.affiliation: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
authors.forename: Xiuming
authors.initials: X
authors.lastname: Jiang
authors.affiliation: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
authors.forename: Guoqiang
authors.initials: G
authors.lastname: Xiang
authors.affiliation: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China; Department of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
authors.forename: Wenjie
authors.initials: W
authors.lastname: Zhao
authors.affiliation: Department of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
authors.forename: Shusheng
authors.initials: S
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D005506:Food Contamination / Q000032:analysis; D052578:Ionic Liquids / Q000737:chemistry; D057230:Limit of Detection; D060328:Magnetic Phenomena; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D063086:Organothiophosphates / Q000737:chemistry / Q000302:isolation & purification*; D010575:Pesticides / Q000737:chemistry / Q000302:isolation & purification*; D052616:Solid Phase Extraction / Q000379:methods; D017550:Spectroscopy, Fourier Transform Infrared; D013662:Tea / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D052578:Ionic Liquids; D058185:Magnetite Nanoparticles; D063086:Organothiophosphates; D010575:Pesticides; D013662:Tea
keywords: Magnetic solid-phase extraction; Organophosphorus pesticide; Poly(ionic liquid) immobilized magnetic nanoparticle; Tea drink