期刊
ANALYTICA CHIMICA ACTA
卷 1166, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.aca.2021.338539
关键词
Covalent organic framework; Carbon nanotubes; Microcystins; Mechanochemical synthesis; Magnetic solid-phase extraction
资金
- National Nature Sciences Foundation of China [21705026]
- Program for Changjiang Scholar and Innovative Research Team in University of China [IRT15R11]
- Collaborative Innovation Center of Chinese Oolong Tea Industry-Collaborative Innovation Center (2011) of Fujian Province
- Fuzhou Science and Technology Plan Project [2019S66]
The magnetic carbon nanotube covalent organic framework composite (MCNTs@TpPa-1) prepared through mechanochemical synthesis showed excellent extraction performance for microcystins (MCs) enrichment. The established MSPE method, combined with HPLC-MS/MS, exhibited efficient, sensitive, and convenient detection of trace MCs in water samples. The results demonstrated the significant potential of MCNTs@TpPa-1 as an MSPE sorbent for trace MCs detection, opening up novel prospects for preparing magnetic covalent organic frameworks (COFs) with excellent extraction properties.
Easy-preparation magnetic solid-phase extraction (MSPE) adsorbents with excellent extraction performance are very indispensable for MSPE techniques. Herein, a magnetic carbon nanotube covalent organic framework composite (MCNTs@TpPa-1) was prepared simply and rapidly through mechanochemical synthesis as MSPE adsorbent for enriching microcystins (MCs). The synthesized MCNTs@TpPa-1 exhibited well water dispersibility, high affinity with MCs and large surface area, resulting in outstanding extraction performance for MCs. Subsequently, combined with high-performance liquid chromatography with tandem mass spectrometry (HPLC-MS/MS), an efficient, sensitive and convenient MSPE method was set up for the determination of trace MCs from aqueous sample, which exhibited acceptable repeatability (RSDs (relative standard deviations) <= 6.8%, n = 6), low limits of detection (LODs, 0.8-1.5 pg mL(-1)), reliable linearity (R >= 0.9991) and broad range of linearity (2.0-1000 pg mL(-1)). Furthermore, the developed method was applied to lake samples and trace MCs (9.6-24.6 pg mL(-1)) were found with satisfactory recovery (85.0-106.0%). The results indicated powerfully MCNTs@TpPa-1 was of significant potential as an MSPE sorbent for detection of trace MCs in water. Moreover, considering the complexity of traditional preparation methods, novel prospects for preparing magnetic covalent organic frameworks (COFs) with excellent extraction properties were opened up. (C) 2021 Published by Elsevier B.V.
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