4.6 Article

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

期刊

ANALYST
卷 137, 期 22, 页码 5411-5419

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/c2an35806a

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资金

  1. National Natural Science Foundation of China [21007035]
  2. Natural Science Foundation of Shandong Province [ZR2010BL029]
  3. Scientific and Technological Developing Project of Shandong Province [2011SJGZ03]
  4. Shandong Analysis and Test Center (SDATC)

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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 pi-pi 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.

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