吸附剂
分子印迹聚合物
固相萃取
材料科学
聚合物
锆
萃取(化学)
吸附
吸附
色谱法
核化学
化学
选择性
有机化学
冶金
催化作用
复合材料
作者
Yutao Liang,Juan He,Huang Zhipeng,Huayu Li,Zhang Yunxia,Wang Huige,Chaofan Rui,Aijun Tong,Liqin You,Kai Li,Shusheng Zhang
标识
DOI:10.1007/s00604-019-3959-7
摘要
A surface imprinted polymer of type UiO-66-NH2@MIP was prepared by combining molecular imprinted polymers (MIPs) and an amino-functionalized zirconium-based metal-organic framework. Quercetin is used as the virtual template, UiO-66-NH2 acts as the carrier to which the monomer acrylamide can be copolymerized. The material was characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. It was used as a sorbent in a solid-phase extraction column. The extraction conditions were optimized. The adsorption capacities for aflatoxins AFB1, AFB2, AFG1 and AFG2 by this SPE and by the commercial SPE were compared. The method was successfully applied to quantify the aflatoxins in grain. Figures of merit include (a) good linearity (range from 0.20-45 μg·kg-1) with R2 (range from 0.9986-0.9994), (b) low detection limits (90-130 ng·kg-1), (c) acceptable reproducibility (1.0-5.9%; for n = 6), and (d) relatively satisfactory recovery rates (74.3-98.6%). The new sorbent has good selectivity and reusability. Graphical abstractUiO-66-NH2@MIPs were synthesized with modified UIO-66-NH2 as core and quercetin as pseudo template. A cartridge was prepared with the polymers as the sorbent, and its performance was compared with different commercial SPE cartridges.
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