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Incorporation of carbon nanotubes into graphene for highly efficient solid-phase microextraction of benzene homologues

Publication date:

June 2018


Source:Microchemical Journal, Volume 139

Author(s): Jianmei Cen, Songbo Wei, Haijun Nan, Jianqiao Xu, Zhoubing Huang, Shuqin Liu, Qingkun Hu, Jun Yan, Gangfeng Ouyang

3D graphene-carbon nanotubes (G-CNTs) composite with unique morphology and structure was prepared by one-step insertion of CNTs into graphene. Subsequently, the G-CNTs composite as a fiber coating material for solid-phase microextraction (SPME) was fabricated on the surface of a stainless steel wire by direct coating method. The prepared coating was tested by the extraction of benzene homologues (BTEX, benzene, toluene, ethylbenzene and m-xylene). Compared with a commercial polydimethylsiloxane (PDMS) fiber, the home-made coating exhibited higher extraction performance for BTEX, and the reasons were discussed systematically. Under the optimized conditions, the prepared coating coupled with chromatography-mass spectrometry (GC–MS) for the analysis of BTEX exhibited wide linear ranges, low limits of detection (3S/N) (LODs, 0.59–2.68ngL−1), low limits of quantification (10S/N) (LOQs, 1.96–8.92ngL−1), good repeatability (3.2–5.5%, n=6) and reproducibility (3.7–9.1%, n=3). Finally, the developed method was successfully applied to the analysis of BTEX in environmental water samples with satisfactory recoveries (84.7–108.1%). This study is expected to further the exploration of high-performance SPME coating materials, and broaden the applications of graphene-based materials.
Graphical abstract




Authors:   Author(s): Jianmei Cen, Songbo Wei, Haijun Nan, Jianqiao Xu, Zhoubing Huang, Shuqin Liu, Qingkun Hu, Jun Yan, Gangfeng Ouyang
Journal:   Microchemical Journal
Volume:   139
Year:   2018
Pages:   203
DOI:   10.1016/j.microc.2018.02.032
Publication date:   15-Apr-2018
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