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期刊名称: ANALYST
Volume:137    Issue:15        Page:3445-3451
ISSN:0003-2654

Facile magnetization of metal-organic framework MIL-101 for magnetic solid-phase extraction of polycyclic aromatic hydrocarbons in environmental water samples期刊论文

作者: Huo Shu-Hui Yan Xiu-Ping
DOI:10.1039/c2an35429b

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页码: 3445-3451
被引频次: 276
出版者: ROYAL SOC CHEMISTRY
期刊名称: ANALYST
ISSN: 0003-2654
卷期: Volume:137    Issue:15
语言: English
摘要: The unusual properties such as high surface area, good thermal stability, uniform structured nanoscale cavities and the availability of in-pore functionality and outer-surface modification make metal-organic frameworks (MOFs) attractive for diverse analytical applications. However, integration of MOFs with magnets for magnetic solid-phase extraction for analytical application has not been attempted so far. Here we show a facile magnetization of MOF MIL-101(Cr) for rapid magnetic solid-phase extraction of polycyclic aromatic hydrocarbons (PAHs) from environmental water samples. MIL-101 is attractive as a sorbent for solid-phase extraction of pollutants in aqueous solution due to its high surface area, large pores, accessible coordinative unsaturated sites, and excellent chemical and solvent stability. In situ magnetization of MIL-101 microcrystals as well as magnetic solid-phase extraction of PAHs was achieved simultaneously by simply mixing MIL-101 and silica-coated Fe 3 O 4 microparticles in a sample solution under sonication. Such MOF-based magnetic solid-phase extraction in combination with high-performance liquid chromatography gave the detection limits of 2.8-27.2 ng L −1 and quantitation limits of 6.3-87.7 ng L −1 for the PAHs. The relative standard deviations for intra- and inter-day analyses were in the range of 3.1-8.7% and 6.1-8.5%, respectively. The results showed that hydrophobic and π-π interactions between the PAHs and the framework terephthalic acid molecules, and the π-complexation between PAHs and the Lewis acid sites in the pores of MIL-101 play a significant role in the adsorption of PAHs. Metal-organic framework MIL-101(Cr) microcrystals were magnetized and explored for rapid magnetic solid-phase extraction of polycyclic aromatic hydrocarbons from environmental water samples.
相关主题: PERFORMANCE LIQUID-CHROMATOGRAPHY, FERRITE MICROSPHERES, NANOPARTICLES, CHEMISTRY, ANALYTICAL, MALDI-TOF-MS, COATED CAPILLARY, MICROEXTRACTION, XYLENE ISOMERS, SORBENT, SEPARATION, MASS-SPECTROMETRY, Particle Size, Water Pollutants, Chemical - isolation & purification, Chromium Compounds - chemistry, Polycyclic Aromatic Hydrocarbons - chemistry, Polycyclic Aromatic Hydrocarbons - isolation & purification, Solid Phase Extraction - methods, Surface Properties, Water Pollutants, Chemical - chemistry, Organometallic Compounds - chemistry, Magnetics,

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