Evaluation of sulfonated graphene sheets as sorbent for micro-solid-phase extraction combined with gas chromatography-mass spectrometry
- 作者：Hong Zhang ; Wei Ping Low ; Hian Kee Lee ; chmleehk@nus.edu.sg
- 关键词：Graphene sheets ; Micro-solid-phase extraction ; Polycyclic aromatic hydrocarbons ; Water
- 刊名：Journal of Chromatography A
- 出版年：2012
- 期刊代码：47_00219673
- 类别：ch
- 出版时间：13 April, 2012
- 卷：1233
- 期：Complete
- 页码：16-21
- 文件大小：804 K
摘要
This report describes the use of sulfonated graphene sheets as sorbent in micro-solid-phase extraction (渭-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. 渭-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 渭g/L for naphthalene and 0.01-100 渭g/L for the remaining PAHs (acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene and pyrene) with coefficient of determination (r2) 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.