title: Biocompatible phosphatidylcholine bilayer coated on magnetic nanoparticles and their application in the extraction of several polycyclic aromatic hydrocarbons from environmental water and milk samples.
abstract: 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 Fe(3)O(4) nanoparticles using a modified dry lipid film hydration method. The resulted Fe(3)O(4)/PC could be readily isolated from solution with a magnet, and exhibited excellent adsorption performance to organic pollutants. Only 0.1g 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 Fe(3)O(4)/PC sorbents in environmental water and biological sample analyses.
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China.
authors.forename: Shengxiao
authors.initials: S
authors.lastname: Zhang
authors.forename: Hongyun
authors.initials: H
authors.lastname: Niu
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Junshen
authors.initials: J
authors.lastname: Liu
authors.forename: Yali
authors.initials: Y
authors.lastname: Shi
authors.forename: Xiaole
authors.initials: X
authors.lastname: Zhang
authors.forename: Yaqi
authors.initials: Y
authors.lastname: Cai
mesh_terms: D000327:Adsorption; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D060766:Drinking Water / Q000737:chemistry*; D006812:Humic Substances / Q000032:analysis; D057230:Limit of Detection; D008051:Lipid Bilayers / Q000737:chemistry; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D008892:Milk / Q000737:chemistry*; D010316:Particle Size; D010713:Phosphatidylcholines / Q000737:chemistry*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D011506:Proteins / Q000737:chemistry; D015203:Reproducibility of Results; D012623:Seawater / Q000737:chemistry; D052616:Solid Phase Extraction; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D001672:Biocompatible Materials; D060766:Drinking Water; D006812:Humic Substances; D008051:Lipid Bilayers; D058185:Magnetite Nanoparticles; D010713:Phosphatidylcholines; D011084:Polycyclic Aromatic Hydrocarbons; D011506:Proteins; D014874:Water Pollutants, Chemical