title: Magnetic porous carbon derived from a bimetallic metal-organic framework for magnetic solid-phase extraction of organochlorine pesticides from drinking and environmental water samples.
abstract: In this work, magnetic porous carbon material derived from a bimetallic metal-organic framework was explored as an adsorbent for magnetic solid-phase extraction of organochlorine pesticides (OCPs). The synthesized porous carbon possessed a high specific surface area and magnetization saturation. The OCPs in the samples were quantified using gas chromatography coupled with a triple quadrupole mass spectrometer. The experimental parameters, including the desorption solvent and conditions, amount of adsorbent, extraction time, extraction temperature, and ionic strength of the solution, were optimized. Under optimal conditions, the developed method displayed good linearity (r>0.99) within the concentration range of 2-500ngL-1. Low limits of detection (0.39-0.70ngL-1, signal-to-noise ratio=3:1) and limits of quantification (1.45-2.0ngL-1, signal-to-noise ratio=10:1) as well as good precision (relative standard deviation<10%) were also obtained. The developed method was applied in the analysis of OCPs in drinking and environmental water samples.
authors.affiliation: Key Laboratory for Applied Technology of Sophisticated Analytical Instruments, Shandong Academy of Sciences, Jinan, Shandong, PR China; College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, PR China.
authors.forename: Yaxi
authors.initials: Y
authors.lastname: Liu
authors.affiliation: College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, PR China.
authors.forename: Zongjun
authors.initials: Z
authors.lastname: Gao
authors.affiliation: Department of Chemistry, The Chinese University of Hong Kong, Hong Kong Special Administrative Region.
authors.forename: Ri
authors.initials: R
authors.lastname: Wu
authors.affiliation: Key Laboratory for Applied Technology of Sophisticated Analytical Instruments, Shandong Academy of Sciences, Jinan, Shandong, PR China.
authors.forename: Zhenhua
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Key Laboratory for Applied Technology of Sophisticated Analytical Instruments, Shandong Academy of Sciences, Jinan, Shandong, PR China. Electronic address: xiangfchensdas@163.com.
authors.forename: Xiangfeng
authors.initials: X
authors.lastname: Chen
authors.affiliation: Department of Chemistry, The Chinese University of Hong Kong, Hong Kong Special Administrative Region.
authors.forename: T-W Dominic
authors.initials: TD
authors.lastname: Chan
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002849:Chromatography, Gas; D060766:Drinking Water / Q000737:chemistry; D004784:Environmental Monitoring / Q000379:methods*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D057230:Limit of Detection; D008670:Metals / Q000737:chemistry; D009994:Osmolar Concentration; D010575:Pesticides / Q000032:analysis*; D016062:Porosity; D059629:Signal-To-Noise Ratio; D052616:Solid Phase Extraction; D012997:Solvents / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D060766:Drinking Water; D006843:Hydrocarbons, Chlorinated; D008670:Metals; D010575:Pesticides; D012997:Solvents; D014874:Water Pollutants, Chemical; D002244:Carbon
keywords: Magnetic solid-phase extraction; Metal-organic frameworks; Organochlorine pesticide; Triple quadrupole mass spectrometer