Journal
TALANTA
Volume 77, Issue 3, Pages 1037-1042Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2008.08.013
Keywords
Magnetic C-18 microspheres; Octadecyl microspheres; Solid-phase extraction; Polycyclic aromatic hydrocarbons; Gas chromatography-mass spectrometry
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Funding
- National Natural Science Foundation of China [20728505]
- Research Fund [20070003026]
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Monodisperse magnetic C-18 microspheres were prepared based on the three-step reactions of solvothermal reduction, silanization and alkylation. The microspheres are of uniform sizes in the range of 200-260 nm. The structure of synthesized magnetic C-18 microspheres was studied by transmission electron microscopy, scanning electron microscopy, X-ray diffraction patterns, element analysis and vibrating sample magnetometry. This material has a high magnetic saturation value of 59emu g(-1) and is easy to manipulate under a magnet. The prepared material was used for the preconcentration of the polycyclic aromatic hydrocarbon in water. The effects of desorption solvent and the amount of adsorbent on the preconcentration were also investigated. The results showed that the developed method was beneficial for the preconcentration of PAHs of middle Molecular weight. (C) 2008 Elsevier B.V. All rights reserved.
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