title: Magnetic microsphere confined ionic liquid as a novel sorbent for the determination of chlorophenols in environmental water samples by liquid chromatography.
abstract: Magnetic microsphere confined ionic liquid was synthesized by covalently bonding N-methylimidazolium on magnetic microspheres. The functionalized magnetic microspheres were characterized by Fourier transform infrared (FT-IR) spectrometry, thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The prepared material was used for the preconcentration of three chlorophenols (CPs) in water combined with high-performance liquid chromatography (HPLC). Several conditions that probably affected the extraction efficiency such as standing time, eluent and its volume, sample pH and volume, were optimized. Under the optimal conditions, good recoveries (70.3-88.8%) were achieved with satisfactory relative standard deviations (RSDs) of less than 6.0%. The limits of detection for the three CPs were 0.20-0.35 μg L(-1). The results indicated that the ionic liquid-functionalized magnetic microspheres show significant promise for the analysis of CPs in environmental samples.
authors.affiliation: State Key Lab of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha 410082, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Yang
authors.forename: Rui
authors.initials: R
authors.lastname: Shen
authors.forename: Yiming
authors.initials: Y
authors.lastname: Long
authors.forename: Xiangyu
authors.initials: X
authors.lastname: Sun
authors.forename: Fei
authors.initials: F
authors.lastname: Tang
authors.forename: Qingyun
authors.initials: Q
authors.lastname: Cai
authors.forename: Shouzhuo
authors.initials: S
authors.lastname: Yao
mesh_terms: D000327:Adsorption; D002733:Chlorophenols / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D005618:Fresh Water / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D052578:Ionic Liquids / Q000737:chemistry*; D057230:Limit of Detection; D008280:Magnetics; D052616:Solid Phase Extraction / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D002733:Chlorophenols; D052578:Ionic Liquids; D014874:Water Pollutants, Chemical