Facile synthesis of a novel magnetic covalent organic frameworks for extraction and determination of five fungicides in Chinese herbal medicines

萃取(化学) 固相萃取 吸附 共价键 色谱法 化学 共价有机骨架 检出限 材料科学 有机化学
作者
Yurui Li,Zhen-Ning Ma,Hongbo Guo,Xiuli Xu,Zhang Feng
出处
期刊:Journal of Separation Science [Wiley]
卷期号:45 (13): 2344-2355 被引量:12
标识
DOI:10.1002/jssc.202200191
摘要

A novel magnetic covalent organic framework was synthesized via a one-step coating approach with solvothermal reaction employing 2,4,6-tris(4-aminophen-yl)-1,3,5-triazine and 2,4,6-triformylphloroglucinol as two building blocks by covalent bonding. The prepared magnetic covalent organic frameworks were properly characterized by different techniques and employed as adsorbents of magnetic solid-phase extraction. An analytical method was developed for the simultaneous determination of five fungicides in two Chinese herbal medicine samples via magnetic solid-phase extraction coupled to ultra high performance liquid chromatography with tandem mass spectrometry analysis. Under optimized magnetic solid-phase extraction conditions, the method exhibited satisfactory recoveries (74.0-109.6%) with relative standard deviations of 0.4-4.6%, low limits of detection (0.003-0.015 μg/kg), and good linearity (R2 > 0.9960). Compared with the traditional extraction method, the proposed method required a lower amount of adsorbent (3 mg) and extraction time (5 min). The adsorbent also had favorable reusability (not less than eight times). Therefore, the magnetic covalent organic frameworks could be a promising adsorbent for the extraction and quantitation of fungicides in Chinese herbal medicines.
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