期刊
TALANTA
卷 161, 期 -, 页码 22-30出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2016.08.009
关键词
Covalent organic frameworks; Schiff base network-1; Solid-phase microextraction; Phenols; Honey samples
资金
- National Natural Science Foundation of China [31471643, 31571925]
- Department of Education of Hebei for Hebei Provincial Universities [LJRC009]
- Science and Technology Foundation of Agricultural University of Hebei [LG201504]
A novel covalent organic framework, Schiff base network-1 (SNW-1), was synthesized and used as a solid-phase microextraction (SPME) fiber coating material. The SNW-1 coated SPME fiber was fabricated by a covalent chemical cross-linking between the SNW-1 nanocomposite and a silanol-functionalized stainless steel wire substrate. Scanning electron microscopy and nitrogen isothermal adsorption results indicate that the new fiber coating exhibited a porous, homogenous surface with the Brunauer-Emmett-Teller surface of 668 m(2) g(-1). The prepared fiber was explored for the SPME of phenols from honey samples prior to their determination by gas chromatography-mass spectrometry. The developed method had large enrichment factors (136-816), low limits of detection (0.06-0.2 ng g(-1)), good linearity (0.1-100.0 ng g(-1)) and repeatability (<9.7%) for phenols. The recoveries for spiked phenols (1.0 ng g(-1) and 10.0 ng g(-1)) in Wolfberry, Robinia and Codonopsis honey samples were in the range of 84.2-107.2% with the relative standard deviations ranging from 3.8% to 12.7%. The developed method was suitable for the determination of phenols from honey samples. (C) 2016 Elsevier B.V. All rights reserved.
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