期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1238, 期 -, 页码 38-45出版社
ELSEVIER
DOI: 10.1016/j.chroma.2012.03.056
关键词
Magnetic nanoparticles; Phosphatidylcholine; Solid-phase extraction; Polycyclic aromatic hydrocarbons
资金
- National Basic Research Program of China [2009CB421605, 2011CB936001]
- National Natural Science Foundation of China [20975110, 20907061, 20921063]
- Natural Science Foundation of Shandong Province [ZR2010BM027, ZR2011BQ012]
In this work, phosphatidylcholine (PC) was coated on magnetic nanoparticles to form lipid bilayer as solid-phase extraction (SPE) sorbents for the enrichment of polycyclic aromatic hydrocarbons (PAHs) from environmental water and milk samples. The lipid bilayer was coated on Fe3O4 nanoparticles using a modified dry lipid film hydration method. The resulted Fe3O4/PC could be readily isolated from solution with a magnet, and exhibited excellent adsorption performance to organic pollutants. Only 0.1 g of sorbents was enough to extract PAHs from 500 mL aqueous solution, and 6 mL of acetonitrile was required to desorb them. The method was fast and relied on 10 min extraction time and 5 min magnetic separation. The proposed method was successfully applied to determine PAHs in some environmental water and milk samples. The detection limit was in the range of 0.2-0.6 ng L-1. The recoveries of the spiked water samples ranged from 89% to 115% with relative standard deviations (RSD) varying from 1% to 8%. For spiked milk samples, RSD was satisfactory (1-9%), but the recoveries were relatively low (42-62%). We show the potentials of Fe3O4/PC sorbents in environmental water and biological sample analyses. (C) 2012 Elsevier B.V. All rights reserved.
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