| Preparation and evaluation of graphene-coated solid-phase microextraction fiber. | |
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MedLine Citation:
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PMID: 20869503 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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In this paper, a novel graphene (G) based solid-phase microextraction (SPME) fiber was firstly prepared by immobilizing the synthesized G on stainless steel wire as coating. The new fiber possessed a homogeneous, porous and wrinkled surface and showed excellent thermal (over 330°C), chemical and mechanical stability, and long lifespan (over 250 extractions). The SPME performance of the G-coated fiber was evaluated in detail through extraction of six pyrethroid pesticides. Although the thickness of G-coated fiber was only 6-8 μm, its extraction efficiencies were higher than those of two commercial fibers (PDMS, 100 μm; PDMS/DVB, 65 μm). This high extraction efficiency may be mainly attributed to huge delocalized π-electron system of G, which shows strong π-stacking interaction with pyrethroid pesticide. The G-coated fiber was applied in the gas chromatographic determination of six pyrethroids, and their limits of detection were found to be ranged from 3.69 to 69.4 ng L(-1). The reproducibility for each single fiber was evaluated and the relative standard deviations (RSDs) were calculated to be in the range from 1.9% to 6.5%. The repeatability of fiber-to-fiber and batch-to-batch was 4.3-9.2% and 4.1-9.9%. The method developed was successfully applied to three pond water samples, and the recoveries were 83-110% at a spiking of 1 μg L(-1). |
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Authors:
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Jinmei Chen; Jing Zou; Jingbin Zeng; Xinhong Song; Jiaojiao Ji; Yiru Wang; Jaeho Ha; Xi Chen |
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Publication Detail:
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Type: Journal Article Date: 2010-08-14 |
Journal Detail:
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Title: Analytica chimica acta Volume: 678 ISSN: 1873-4324 ISO Abbreviation: Anal. Chim. Acta Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-09-27 Completed Date: 2011-01-12 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370534 Medline TA: Anal Chim Acta Country: Netherlands |
Other Details:
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Languages: eng Pagination: 44-9 Citation Subset: - |
Copyright Information:
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Copyright © 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Department of Chemistry and the Key Laboratory of Analytical Sciences of the Ministry of Education, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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