Facile preparation of novel COFs functionalized magnetic core-shell structured nanocomposites and used for rapid detection of trace polycyclic aromatic hydrocarbons in food
Facile preparation of novel COFs functionalized magnetic core-shell structured nanocomposites and used for rapid detection of trace polycyclic aromatic hydrocarbons in food
复制标题
轻松制备新型COFs功能化磁性核壳结构纳米复合材料并用于快速检测食品中的痕量多环芳烃
DOI：
10.1016/j.microc.2020.105460
复制
发表时间：
2020-12-01
影响因子：
4.8
通讯作者：
Zheng, Fuping
中科院分区：
文献类型：
--
作者：
Chen, Jian;Li, Na;Zheng, Fuping
开发了一种基于磁性共价有机骨架并结合高效液相色谱二极管阵列检测器（HPLC-DAD）的简便快速的磁性固相萃取（MSPE），用于检测食品样品中的11种多环芳烃（PAH）。本文以磁性 Fe3O4 纳米颗粒（NPs）为核心，以 1,3,5-三（4-氨基苯基）苯（TAPB）和 2,5-二羟基对苯二甲醛（DP）作为两个配体在核外构建壳层，制备了新型磁性核壳结构（Fe3O4@COFs）纳米复合材料。这些新型纳米复合材料由于具有大比表面积、高孔隙率和优异的热稳定性等优点，被用作优良的吸附剂来富集多环芳烃。系统研究了MSPE过程中影响富集效率的条件，包括解吸溶剂、吸附剂用量、萃取时间、解吸时间和解吸吸附量。将MSPE与HPLC-DAD相结合，成功建立了痕量PAHs的有效检测方法，其R-2在0.9954~0.9988范围内线性良好，回收率在83.2~119.3%范围内，相对标准偏差（RSD）低于5.8%。此外，所提出的 MSPE-HPLC-DAD 方法显示出有效富集食品样品中痕量 PAH 的优异能力，并在提取其他芳香族化合物方面具有潜在应用。
A facile and rapid magnetic solid phase extraction (MSPE) based on magnetic covalent organic framework and coupled with high performance liquid chromatography diode array detection (HPLC-DAD) has been developed for detection of 11 kind of polycyclic aromatic hydrocarbons (PAHs) in food samples. In this paper, the novel magnetic core-shell structured (Fe3O4@COFs) nanocomposites were consisted with the magnetic Fe3O4 nanoparticles (NPs) as a core, and 1,3,5-tris (4-aminophenyl) benzene (TAPB) and 2,5-dihydroxyterephthalaldehyde (DP) as two ligands for building shell outside of the core. These new nanocomposites were applied as superior adsorbent to enrich the PAHs due to their merits of large specific surface area, highly porosity and excellent thermal stability. The conditions that may affect the enrichment efficiency in MSPE process, including desorption solvent, amount of sorbent, extraction time, desorption time and desorption adsorption volume were investigated systematically. By combining MSPE with HPLC-DAD, an effective method for the detection of trace PAHs was successfully developed, which exhibited good linearity with R-2 ranging from 0.9954 to 0.9988, satisfactory recoveries in the range of 83.2-119.3%, and the relative standard deviations (RSD) was lower than 5.8%. In addition, the proposed MSPE-HPLC-DAD method was shown excellent ability to enrich trace PAHs effectively in food samples and potential application in extract other aromatic compounds.