期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1395, 期 -, 页码 1-6出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2015.03.038
关键词
Supercritical fluid extraction; Carbon nanotubes; Polycyclic aromatic hydrocarbons
资金
- National Natural Science Foundation of China [21205137]
- Beijing Natural Science Foundation [2132041]
- Science Foundation of China University of Petroleum, Beijing [YJRC-2013-08]
A supercritical fluid extraction (SFE) method with an online solid collection trap has been developed for the quantitative analysis of 16 polycyclic aromatic hydrocarbons (PAHs) and 15 typical PAH derivatives in solid matrix. Compared with liquid trapping and C18 solid-phase trapping, multi-walled carbon nano-tubes (CNTs) were proved to be the most efficient trapping sorbent for the collection of PAHs and their nitro-, oxy- and alkyl-derivatives. The proposed extraction-collection procedure was systematically optimized in terms of pressure, temperature, extraction time, trapping materials, supercritical fluid flow rate, co-solvent type, and co-solvent percentage, taking into account the interaction between these variables. The whole extraction process could be completed in 15 min followed by GC-MS analysis. Quantitative recoveries of PAHs and their derivatives from spiked soil samples (50 ngg(-1)) were obtained in the range of 62.9-111.8%with the precisions (RSD, intra-day) ranged from 1.9% to 13.7%. The developed SFE method with online CNTs trapping followed by GC-MS analysis has been demonstrated to be an efficient way for quantitative analysis of trace-level PAHs and their nitro-, oxy-, and alkyl-derivatives in soil samples. (C) 2015 Elsevier B.V. All rights reserved.
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