College of Science, Hebei Agricultural University, Baoding 071001, Hebei, China.
College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China.
J Agric Food Chem. 2023 Feb 15;71(6):3068-3078. doi: 10.1021/acs.jafc.2c08063. Epub 2023 Feb 3.
Food safety issue caused by aflatoxins has aroused widespread concern in society. Herein, a novel fluorine-functionalized triazine-based porous organic polymer (F-POP) was developed for the first time by the simple condensation polymerization of 2,2'-bis(trifluoromethyl)benzidine and cyanuric chloride. With in-built fluorine functional group (F) and imine group (-NH-), F-POP displayed significantly superior adsorption ability for aflatoxins, outperforming fluorine-free POP due to the multiple interaction mechanisms of hydrogen bond, F-O interaction, π-π interaction, F-π interaction, and hydrophobic interaction. Thus, magnetic F-POP was prepared by introducing FeO into F-POP and then utilized as a magnetic sorbent for the extraction of trace aflatoxins in peanut and rice samples prior to high-performance liquid chromatography-fluorescence detection. Under the optimal conditions, the proposed method presented high sensitivity with the limit of detections at 0.005-0.15 ng g. F-POP also exhibited outstanding adsorption capability for many other organic pollutants, revealing its great potential for analysis or adsorption applications.
由黄曲霉毒素引起的食品安全问题引起了社会的广泛关注。在此，首次通过 2,2'-双（三氟甲基）联苯胺和三聚氰胺的简单缩聚反应开发了一种新型的含氟三嗪基多孔有机聚合物（F-POP）。由于其内置的氟官能团（F）和亚胺基团（-NH-），F-POP 对黄曲霉毒素表现出明显优越的吸附能力，优于无氟 POP，这是由于氢键、F-O 相互作用、π-π 相互作用、F-π 相互作用和疏水相互作用的多种相互作用机制所致。因此，通过将 FeO 引入 F-POP 中制备了磁性 F-POP，然后将其用作高效液相色谱-荧光检测之前花生和大米样品中痕量黄曲霉毒素的磁性吸附剂。在最佳条件下，该方法具有较高的灵敏度，检出限为 0.005-0.15ng/g。F-POP 对许多其他有机污染物也表现出出色的吸附能力，显示出其在分析或吸附应用方面的巨大潜力。
