Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1233, Issue -, Pages 16-21Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2012.02.020
Keywords
Graphene sheets; Micro-solid-phase extraction; Polycyclic aromatic hydrocarbons; Water
Funding
- Singapore National Research Foundation
- National University of Singapore
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This report describes the use of sulfonated graphene sheets as sorbent in micro-solid-phase extraction (mu-SPE), together with gas chromatography-mass spectrometry, for the determination of polycyclic aromatic hydrocarbons (PAHs) in water. In this study, for the first time, graphene sheets were used as a sorbent material for this mode of microextraction. The modified graphene sheets were characterized by transmission electron microscopy. Fourier transform infrared spectroscopy, and elemental analysis. mu-SPE parameters such as extraction time, desorption time and desorption solvent were optimized. The method showed good precision, reproducibility and linear response for PAH analysis over a concentration range of 0.05-100 mu g/L for naphthalene and 0.01-100 mu g/L for the remaining PAHs (acenaphthene, fluorene, phenanthrene. anthracene, fluoranthene and pyrene) with coefficient of determination (r(2)) of higher than 0.992. Limits of detection of from 0.8 to 3.9 ng/L for 7 PAHs were achieved. The developed method was successfully applied to determine PAHs in river water samples. (C) 2012 Elsevier B.V. All rights reserved.
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