期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1456, 期 -, 页码 42-48出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2016.06.004
关键词
Magnetic solid-phase extraction; Alkylphenol; Thermo-responsive polymer; Metal-organic frameworks; Environmental water samples
资金
- National Natural Science Foundation of China [NSFC 21205071, 21477068, 21407099]
- Natural Science Foundation of Shandong Province [ZR2012BQ009]
- Fundamental Research Funds of Shandong Academy of Sciences
- Funds for Fostering Distinguished Young Scholar of Shandong Academy of Sciences
In this work, the thermo-responsive polymer PNIPAM tethered to Fe3O4@SiO2@MOF core-shell magnetic microspheres was first synthesized by a surface-selective post-synthetic strategy and underwent highly efficient magnetic solid-phase extraction (MSPE) of alkylphenols from aqueous samples. Alkylphenols, including 4-tert-octylphenol (OP) and 4-n-nonylphenol (NP), were selected as target compounds. The sample quantification was carried out using LC-MS/MS in multiple reaction monitor (MRM) mode. Under optimal working conditions, the developed method showed good linearity in the range of 5-1000 ng L-1, a low limit of detection (1.5 ng L-1), and good repeatability (relative standard deviation, <8%, n = 5) for NP and OP. Owning to the hydrophilic/hydrophobic switchable properties of the nanocomposite, high recoveries (78.7-104.3%) of alkylphenols were obtained under different extraction conditions. The levels of OP and NP in environmental samples collected from local river, lake and pond waters were analyzed using the developed method. It was believed that the synthesized material with the thermo-responsive coating, large surface areas and magnetic properties should have great potential in the extraction and removal of alkylphenols from environmental samples. (C) 2016 Elsevier B.V. All rights reserved.
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