Journal
JOURNAL OF SEPARATION SCIENCE
Volume 35, Issue 12, Pages 1531-1537Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201200124
Keywords
Graphene oxide; Magnetron sputtering; Octadecyltrichlorosilane; Si interlayer; Solid-phase microextraction
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Funding
- National Natural Science Foundation of China [20975105, 21175143]
- National Science & Technology Major Project of China [2011ZX05010, 2011ZX05011]
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A novel C18 functionalized graphene oxide (GO) coated solid-phase microextraction fiber was prepared by a novel protocol. Based on the strong van der Waals interaction present in GO and abundant oxygenous groups in GO sheets, a simple layer-by-layer self-assembly method was used in the preparation process and then C18 was successfully self-assembled on GO via C-O-Si bonding. Coupled with gas chromatography, extraction performance of the fiber was tested with polycyclic aromatic hydrocarbons (PAHs) as model analytes. The fiber not only exhibited excellent extraction efficiency and selectivity, but also showed many advantages including high rigidity, long service life and well stability toward organic solvent, acidic and alkali solutions, and high temperature. The relative standard deviations for single-fiber repeatability and fiber-to-fiber reproducibility were less than 7.26 and 17.25%, respectively. The detection limits to the PAHs were less than 0.08 mu g L-1 and the calibration curves were linear in a wide range for all analytes. The as-established Solid-phase microextraction GC method was also successfully used for determination of PAHs in two real water samples.
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