期刊
ANALYTICA CHIMICA ACTA
卷 829, 期 -, 页码 22-27出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2014.04.039
关键词
Solid-phase microextraction; IRMOF-3; Ionic liquids; Polydimethylsiloxane; Polycyclic aromatic hydrocarbons
资金
- 973 project [2012CB821701]
- NNSFC [21037001, 21225731]
- NSF of Guangdong Province [S2013030013474]
- Fundamental Research Funds for the Central Universities [131gjc11]
A superior solid-phase microextraction (SPME) fiber-coating material, IRMOF-3@ILs/PDMS, was prepared by the in situ growth of IRMOF-3 onto stainless-steel wires and protection with ionic liquids (ILs) and polydimethylsiloxane (PDMS). The ILs can efficiently prevent the substantial cracking of IRMOF-3 caused by moisture, and a thin PDMS film can protect the IRMOF-3@ ILs material to achieve a much better extraction efficiency as well as excellent resistance to high temperature and high humidity. This IRMOF-3@ ILs/PDMS coating possessed a porous structure, a rough surface and an increased lifespan (by at least 100 times) compared with that of IRMOF-3. The coating was evaluated by analyzing four polycyclic aromatic hydrocarbons (PAHs) in water, and good precision (< 7.7%), low detection limits (12.0-15.4 ng L (1)), and wide linearity (50-20,000 ng L (1)) were achieved under the optimized conditions. The fiber was successfully applied to the sensitive analysis of PAHs in rainwater by coupling it with gas chromatography-mass spectrometry (GC-MS). (C) 2014 Elsevier B.V. All rights reserved.
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