期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1374, 期 -, 页码 50-57出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2014.11.048
关键词
Multiwalled carbon nanotubes; Polycyclic aromatic hydrocarbons; Smoked rice; Solid-phase microextraction; Gas chromatography
A novel solid-phase microextraction fiber was prepared based on multiwalled carbon nanotubes (MWCNTs) loaded on hollow fiber membrane pores. Stainless steel wire was used as unbreakable support. The major advantages of the proposed fiber are its (a) high reproducibility due to the uniform structure of the hollow fiber membranes, (b) high extraction capacity related to the porous structure of the hollow fiber and outstanding adsorptive characteristics of MWCNTs. The proposed fiber was applied for the microextraction of five representative polycyclic aromatic hydrocarbons (PAHs) from aqueous media (river and hubble-bubble water) and smoked rice samples followed by gas chromatographic determination. Analytical merits of the method, including high correlation coefficients [(0.9963-0.9992) and (0.9982-0.9999)] and low detection limits [(9.0-13.0 ng L-1) and (40.0-150.0 ng kg(-1))] for water and rice samples, respectively, made the proposed method suitable for the ultra-trace determination of PAHs. (C) 2014 Elsevier B.V. All rights reserved.
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