title: Determination of five pyrethroids in tea drinks by dispersive solid phase extraction with polyaniline-coated magnetic particles.
abstract: The polyaniline-coated magnetic particles with bowl-shaped morphology (Fe3O4/C/PANI microbowls) were successfully prepared and characterized by scanning electron microscopy, transmission electron microscopy and vibrating sample magnetometry. The prepared microbowls were used as the magnetic adsorbent in dispersive solid phase extraction of five pyrethroids, including cyhalothrin, beta-cypermethrin, esfenvalerate, permethrin and bifenthrin in plain tea drinks. The effects of experiment factors, including amount of Fe3O4/C/PANI microbowls, pH value, ultrasound extraction time and desorption conditions, were investigated. The extraction recoveries obtained with 8 mg of magnetic microbowls were satisfactory, and the microbowls can be reused after easy washing. Thus, a simple, selective and effective method for the determination of the pyrethroids was established successfully. The results showed that the method had good linearity (r=0.9992-0.9998), and the limits of detections (LODs) were from 0.025 to 0.032 ng mL(-1). The intra-day and inter-day relative standard deviations (RSDs) were in the range of 2.4-6.1% and 3.5-8.8%, respectively. Recoveries obtained by analyzing the real tea drinks were in the range of 72.1-118.4%.
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
authors.forename: Yuanpeng
authors.initials: Y
authors.lastname: Wang
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Sun
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Gao
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
authors.forename: Bo
authors.initials: B
authors.lastname: Xu
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
authors.forename: Qiong
authors.initials: Q
authors.lastname: Wu
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
authors.forename: Hanqi
authors.initials: H
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China. Electronic address: songdq@jlu.edu.cn.
authors.forename: Daqian
authors.initials: D
authors.lastname: Song
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D001628:Beverages / Q000032:analysis*; D002853:Chromatography, Liquid / Q000379:methods; D008280:Magnetics; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D011722:Pyrethrins / Q000032:analysis*; D052616:Solid Phase Extraction / Q000379:methods*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013662:Tea / Q000737:chemistry*
chemical_list: D000814:Aniline Compounds; D011722:Pyrethrins; D013662:Tea; C416807:polyaniline
keywords: Dispersive solid phase extraction; Polyaniline-coated magnetic microbowls; Pyrethroids; Tea drinks; Ultra fast liquid chromatography