期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1630, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.chroma.2020.461534
关键词
Covalent organic frameworks; Polybrominated diphenyl ethers; Magnetic solid-phase extraction; Gas chromatography-mass spectrometry; Water samples
资金
- National Key Research and Development Program of China [2018YFC1602300]
- Shandong Agricultural Applied Technology Innovation Project (2018) (Research and demonstration of key technologies for efficient identification and confirmation of key hazardous substances in exported vegetables)
- Shandong Province Taishan Scholars Program [ts201712063, ts20190948]
Novel core shell structured magnetic covalent organic frameworks were synthesized at room temperature and first applied in water samples for the enrichment of trace polybrominated diphenyl ethers (PBDEs) through magnetic solid-phase extraction. The prepared materials were characterized through transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, vibrating sample magnetometer and X-ray photoelectron spectroscopy. During adsorption, the parameters affecting extraction and desorption efficiency were further optimized. Combined gas chromatography and mass spectrometry (GC/MS) revealed that high enrichment factors (275-292), low limits of detection (0.12-0.38 ng L-1), wide linear ranges (0.5-1000 ng L-1), and good reproducibility (intra-day 1.40%-4.31% and inter-day 5.14%-9.12%) were obtained under optimal conditions. The method successfully detected PBDEs in different water samples. (C) 2020 Elsevier B.V. All rights reserved.
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