期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1429, 期 -, 页码 97-106出版社
ELSEVIER
DOI: 10.1016/j.chroma.2015.12.032
关键词
Headspace sampling; Polycyclic aromatic hydrocarbons; Environmentally friendly; Cholesterol-functionalized MNPs
资金
- National Science Foundation of China [21175038, 21235002]
- National Basic Research Program of China [2009CB421601]
- Scientific and Technical Project of Jiangxi Provincial Education Department [GJJ13604]
- Science and Technology Support Program of Jiangxi Provincial Science and Technology Agency [20112BBG70021]
A magnetic solid phase extraction (MSPE) protocol combining a static headspace gas chromatography coupled to mass spectrometry (HS-GC-MS) method has been developed for extraction, and determination of 16 polycyclic aromatic hydrocarbons (PAHs) in drinking water samples. Magnetic nanoparticles (MNPs) were coated with 3-aminopropyltriethoxysilane and modified by cholesterol chloroformate. Transmission electron microscope, vibrating sample magnetometer, Fourier transform infrared spectrometry and X-ray photoelectron spectroscopy were used to characterize the cholesterol-functionalized sorbents, and the main parameters affecting the extraction as well as HS sampling, such as sorbent amount, extraction time, oven temperature and equilibration time have been investigated and established. Combination with HS sampling, the MSPE procedure was simple, fast and environmentally friendly, without need of any organic solvent. Method validation proved the feasibility of the developed sorbents for the quantitation of the investigated analytes at trace levels obtaining the limit of detection (S/N = 3) ranging from 0.20 to 7.8 ng/L. Good values for intra and inter-day precision were obtained (RSDs <= 9.9%). The proposed method was successfully applied to drinking water samples. (C) 2015 Elsevier B.V. All rights reserved.
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