Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1325, Issue -, Pages 8-15Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2013.11.052
Keywords
Carbon doped Fe3O4 nanoparticles; Magnetic solid-phase extraction; Polycyclic aromatic hydrocarbon; Hydrophobic interaction; Dipole-dipole attraction; Hydrogen bonding
Funding
- National Basic Research Program of China (973 program) [2009CB421601, 2011CB911003]
- National Natural Science Foundation of China [21275069, 90913012]
- National Science Funds for Creative Research Groups [21121091]
- Natural Science Foundation of the Jiangsu Higher Education Institution of China [11KJB150008]
- Analysis & Test Fund of Nanjing University
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Carbon decorated Fe3O4 nanoparticles (Fe3O4/C) are promising magnetic solid-phase extraction (MSPE) sorbents in environmental and biological analysis. Fe3O4/C based MSPE method shows advantages of easy operation, rapidness, high sensitivity, and environmental friendliness. In this paper, the MSPE mechanism of Fe3O4/C nanoparticles has been comprehensively investigated, for the first time, through the following three efforts: (I) the comparison of extraction efficiency for polycyclic aromatic hydrocarbons (PAHs) between the Fe3O4/C sorbents and activated carbon; (2) the chromatographic retention behaviors of hydrophobic and hydrophilic compounds on Fe3O4/C nanoparticles as stationary phase; (3) related MSPE experiments for several typical compounds such as pyrene, naphthalene, benzene, phenol, resorcinol, anisole and thioanisole. It can be concluded that there are hybrid hydrophobic interaction and hydrogen bonding interaction or dipole-dipole attraction between Fe3O4/C sorbents and analytes. It is the existence of carbon and oxygen-containing functional groups coated on the surface of Fe3O4/C nanoparticles that is responsible for the effective extraction process. (C) 2013 Elsevier B.V. All rights reserved.
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