吸附
解吸
化学
固相萃取
检出限
萃取(化学)
色谱法
洛美沙星
分析化学(期刊)
傅里叶变换红外光谱
材料科学
诺氟沙星
化学工程
有机化学
工程类
生物化学
抗生素
环丙沙星
作者
Shuping Guan,Hao Wu,Yang Liu,Zhuliang Wang,Jianmin Wu
标识
DOI:10.1002/jssc.202000616
摘要
Abstract A magnetic covalent organic framework material was synthesized with a core‐shell structure using a simple solvothermal method. It was prepared with Fe 3 O 4 as the magnetic core, covalent organic framework as the shell, which synthesized from 1,3,5‐triformylphloroglucinol and p ‐phenylenediamine by Schiff base reaction. Transmission electron microscopy, Fourier transform infrared spectroscopy, powder X‐ray diffraction, vibrating sample magnetometry, and nitrogen adsorption‐desorption were used to characterize magnetic adsorbent. It has showed a large specific surface area (505.6 m 2 /g), which can provide many adsorption sites. Moreover, the saturation magnetization value was 48.4 emu/g enough to be separated by external magnet. Six kinds of fluoroquinolones (enoxacin, fleroxacin, ofloxacin, norfloxacin, pefloxacin, and lomefloxacin) were extracted by magnetic solid phase extraction with the magnetic adsorbent. High‐performance liquid chromatography detects the entire adsorption and desorption process to further evaluate the optimal extraction and desorption conditions. Under the optimal chromatographic conditions, this method showed a low detection limit (0.05 to 0.20 μg/L), good linearity in the range of 0.5 to 200 μg/L, and the enrichment factor reaches 115.5‐127.3. The spiked recovery of the fluoroquinolones in milk sample ranged from 90.4 to 101.2%.
科研通智能强力驱动
Strongly Powered by AbleSci AI