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C 18 functionalized graphene oxide as a novel coating for solid‐phase microextraction
Author(s) -
Xu Lili,
Feng Juanjuan,
Liang Xiaojing,
Li Jubai,
Jiang Shengxiang
Publication year - 2012
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201200124
Subject(s) - solid phase microextraction , graphene , fiber , repeatability , extraction (chemistry) , coating , chromatography , calibration curve , detection limit , oxide , gas chromatography , chemistry , analyte , solvent , materials science , analytical chemistry (journal) , gas chromatography–mass spectrometry , nanotechnology , organic chemistry , mass spectrometry
A novel C 18 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 C 18 was successfully self‐assembled on GO via C‐O‐S i bonding. Coupled with gas chromatography, extraction performance of the fiber was tested with polycyclic aromatic hydrocarbons ( PAH s) 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 PAH s were less than 0.08 μg 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 PAH s in two real water samples.