title: Metal-organic framework MIL-53(Al) as a solid-phase microextraction adsorbent for the determination of 16 polycyclic aromatic hydrocarbons in water samples by gas chromatography-tandem mass spectrometry.
abstract: In this paper, the potential applications of metal-organic framework (MOF) materials as fiber coatings for the solid-phase microextraction (SPME) of polycyclic aromatic hydrocarbons (PAHs) in water samples were explored. Fibers coated with MIL-53(Al, Cr, Fe) materials were fabricated by an adhesive method for SPME. The quantitation was performed by gas chromatography-tandem mass spectrometry (GC-MS/MS) using the multiple reaction monitoring mode. Among the three MIL-53(M) coatings, MIL-53(Al) showed the highest extraction efficiency towards PAHs under the current fabrication procedure. Under optimized conditions, the MIL-53(Al)-coated fiber showed good precision (relative standard deviation <12.5%), low detection limits (0.10 ng L(-1) to 0.73 ng L(-1), S/N = 3), and good linearity (R(2) > 0.98) for aqueous solutions containing 16 PAH . The fiber also offered high thermal and chemical stability. The method developed based on MIL-53(Al) SPME-GC-MS/MS was successfully applied in the analysis of real water samples. Based on the simulation results, the PAHs were adsorbed on MIL-53(Al) primarily through the hydrophobic and π-π interactions between PAHs and the organic linker of the material. The results presented in this paper indicate that water-stable MOF materials have great potential for the SPME of aromatic compounds in water samples.
authors.affiliation: Key Laboratory for Applied Technology of Sophisticated Analytical Instruments, Academy of Sciences, Jinan, Shandong, P. R. China.
authors.forename: Xiang-Feng
authors.initials: XF
authors.lastname: Chen
authors.forename: Hao
authors.initials: H
authors.lastname: Zang
authors.forename: Xia
authors.initials: X
authors.lastname: Wang
authors.forename: Jian-Guang
authors.initials: JG
authors.lastname: Cheng
authors.forename: Ru-Song
authors.initials: RS
authors.lastname: Zhao
authors.forename: Chuan-Ge
authors.initials: CG
authors.lastname: Cheng
authors.forename: Xiao-Qing
authors.initials: XQ
authors.lastname: Lu