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

Authors :
Cen, Jianmei
Yan, Jun
Wei, Songbo
Nan, Haijun
Xu, Jianqiao
Liu, Shuqin
Hu, Qingkun
Ouyang, Gangfeng
Huang, Zhoubing
Source :
Microchemical Journal. Jun2018, Vol. 139, p203-209. 7p.
Publication Year :
2018

Abstract

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 (3 S/N) (LODs, 0.59–2.68 ng L −1 ), low limits of quantification (10 S/N) (LOQs, 1.96–8.92 ng L −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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0026265X
Volume :
139
Database :
Academic Search Index
Journal :
Microchemical Journal
Publication Type :
Academic Journal
Accession number :
129121963
Full Text :
https://doi.org/10.1016/j.microc.2018.02.032