title: Polydimethylsiloxane/metal-organic frameworks coated fiber for solid-phase microextraction of polycyclic aromatic hydrocarbons in river and lake water samples.
abstract: In this study, polydimethylsiloxane/metal-organic frameworks (PDMS/MOFs), including PDMS/MIL-101 and PDMS/MOF-199, were immobilized onto a stainless steel wire through sol-gel technique as solid-phase microextraction (SPME) fiber coating. The prepared fibers were used for the extraction of some polycyclic aromatic hydrocarbons (PAHs) from water samples prior to gas chromatography-mass spectrometry (GC-MS) analysis. Under the optimized experiment conditions, the PDMS/MIL-101 coated fiber exhibited higher extraction efficiency towards PAHs than that of PDMS/MOF-199. Several parameters affecting the extraction of PAHs by SPME with PDMS/MIL-101 fiber, including the extraction temperature, extraction time, sample volume, salt addition and desorption conditions, were investigated. The limits of detection (LODs) were less than 4.0 ng L(-1) and the linearity was observed in the range from 0.01 to 2.0 µg L(-1) with the correlation coefficients (r) ranging from 0.9940 to 0.9986. The recoveries of the method for the PAHs from water samples at spiking levels of 0.05 and 0.2 µg L(-1) ranged from 78.2% to 110.3%. Single fiber repeatability and fiber-to-fiber reproducibility were less than 9.3% and 13.8%, respectively.
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding 071001, China.
authors.forename: Guijiang
authors.initials: G
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding 071001, China.
authors.forename: Xiaohuan
authors.initials: X
authors.lastname: Zang
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding 071001, China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Li
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding 071001, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding 071001, China. Electronic address: zhiwang2000@hotmail.com.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Wang
mesh_terms: D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D060106:Lakes; D008024:Ligands; D057230:Limit of Detection; D008670:Metals / Q000737:chemistry*; D009930:Organic Chemicals / Q000737:chemistry*; D044367:Phase Transition; D011084:Polycyclic Aromatic Hydrocarbons / Q000737:chemistry*; D015203:Reproducibility of Results; D045483:Rivers; D012492:Salts / Q000737:chemistry; D052617:Solid Phase Microextraction / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014961:X-Ray Diffraction
chemical_list: D004129:Dimethylpolysiloxanes; D008024:Ligands; D008670:Metals; D009930:Organic Chemicals; D011084:Polycyclic Aromatic Hydrocarbons; D012492:Salts; D014874:Water Pollutants, Chemical; D014867:Water; C013830:baysilon
keywords: Gas chromatography–mass spectrometry; Metal-organic frameworks; Polycyclic aromatic hydrocarbons; Solid-phase microextraction; Sol–gel technology