Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1517, Issue -, Pages 18-25Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2017.08.039
Keywords
Magnetic solid-phase extraction; Magnetic metal-organic frameworks; In situ calcination method; Polycyclic aromatic hydrocarbons
Funding
- National Natural Science Foundation of China [21305112, 21462036, 21475095]
- Natural Science Foundation of Gansu Province [145RJYA239]
- Open Foundation of CAS Key Laboratory of Molecular Recognition and Function [2012LMRF009]
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In this study, we report a facile, environmental friendly fabrication of a type of magnetic metal-organic framework (MOF) MIL-100 that can be used for magnetic solid-phase extraction (MSPE). The magnetic MOF composites were fabricated using in situ calcination method. The as-synthesized materials exhibited both high porosity and magnetic characteristics. They used for the MSPE of polycyclic aromatic hydrocarbons (PAHs) from water samples. Such MOF-based magnetic solid-phase extraction in combination with gas chromatography equipped with a flame ionization detector (GC-FID), exhibited wide linearity (0.02-250 mu g L-1), low detection limits (4.6-8.9 ng L-1), and high enrichment factors (452-907) for PAHs. The relative standard deviations (RSDs) for intra- and inter-day extractions of PAHs were ranging from 1.7% to 9.8% and 3.8% to 9.2%, respectively. The recoveries for spiked PAHs (1 mu g L-1) in water samples were in the range of 88.5% to 106.6%. The results showed that the special anion-pi orbital (electron donor acceptor) interaction and pi-pi stacking between magnetic MIL-100 and PAHs play an important role in the adsorption of PAHs. (C) 2017 Published by Elsevier B.V.
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