Magnetic covalent triazine-based frameworks as magnetic solid-phase extraction adsorbents for sensitive determination of perfluorinated compounds in environmental water samples
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Covalent organic frameworks (COFs), which are a new type of carbonaceous polymeric material, have attracted great interest because of their large surface area and high chemical and thermal stability. However, to the best of our knowledge, no work has reported the use of magnetic COFs as adsorbents for magnetic solid-phase extraction (MSPE) to enrich and determine environmental pollutants. This work aims to investigate the feasibility of using covalent triazine-based framework (CTF)/Fe2O3 composites as MSPE adsorbents to enrich and analyze perfluorinated compounds (PFCs) at trace levels in water samples. Under the optimal conditions, the method developed exhibited low limits of detection (0.62–1.39 ng·L-1), a wide linear range (5–4000 ng L-1), good repeatability (1.12–9.71%), and good reproducibility (2.45–7.74%). The new method was successfully used to determine PFCs in actual environmental water samples. MSPE based on CTF/Fe2O3 composites exhibits potential for analysis of PFCs at trace levels in environmental water samples.
KeywordsMagnetic covalent triazine-based frameworks Magnetic solid-phase extraction Perfluorinated compounds Liquid chromatography–tandem mass spectrometry Environmental water samples
This work was supported by the National Natural Science Foundation of China (21777089 and 21477068), the Key Research and Development Program of Shandong Province (2017GSF17107), and the Shandong Province Taishan Scholar Program (Jin-Ming Lin).
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Conflict of interest
The authors declare that they have no competing interests.
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