期刊
MICROCHEMICAL JOURNAL
卷 96, 期 2, 页码 317-323出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.microc.2010.05.002
关键词
Cryogel; Multiwall carbon nanotubes; Polycyclic aromatic hydrocarbons; Composite; Solid phase extraction; Trace analysis
资金
- Thailand Research Fund
- Center for Innovation in Chemistry (PERCH-CIC)
- Commission on Higher Education
- Ministry of Education
- Trace Analysis and Biosensor Research Center, Prince of Songkla University
- Department of Chemistry, Faculty of Science
- Graduate School, Prince of Songkla University, Hat Yai, Thailand
A new cost-effective sorbent, multiwalled carbon nanotubes/poly (vinyl alcohol) cryogel composite (MWCNTs/PVA), was prepared under frozen conditions for the extraction and preconcentration of trace polycyclic aromatic hydrocarbons (PAHs) in water samples. This was followed by high performance liquid chromatography (HPLC) with fluorescence detection. The proposed method provided a high enrichment factor with an extremely high extraction efficiency (89-98%) of three spiked levels of three standard PAHs with relative standard deviations of less than 8%. The low detection limits of the method were 5, 8 and 5 ng L-1 for benzo(a)anthracene, benzo(b)fluoranthene and benzo(a)pyrene, respectively. This method was successfully applied for the determination of the three PAHs in real water samples where they were found in the range of 7 to 22 ng L-1. The major advantages of MWCNTs/PVA over the commercial C-18 is that it can be operated at a higher loading flow rate without sorbent clogging and requires a shorter time for completion without any loss of extraction efficiency. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
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