College of Science, Hebei Agricultural University, Baoding 071001, China.
College of Science, Hebei Agricultural University, Baoding 071001, China; College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China.
Food Chem. 2022 Mar 30;373(Pt B):131572. doi: 10.1016/j.foodchem.2021.131572. Epub 2021 Nov 9.
In this work, a natural proanthocyanidin (PA) based magnetic nanoporous organic polymer (named as PA-MOP) was successfully synthesized for the first time. The PA-MOP possessed high hydrophilic-surface, good magnetic responsiveness and high affinity for neonicotinoid insecticides. It was applied as an advanced magnetic sorbent for extraction of four neonicotinoids (thiamethoxam, imidacloprid, acetamiprid and thiacloprid) from environmental water, peach juice and honey samples prior to HPLC analysis. Under optimal conditions, the limits of detection for the analytes at S/N = 3 were 0.02-0.08 ng mL for water, 0.03-0.10 ng mL for peach juice and 0.05-0.16 ng g for honey sample. The method recoveries were 80.0%-114.8%, with the relative standard deviations below 6.8%. The values of matrix effect were from -1.5% to -9.3%. Based on theory calculation, the extraction mechanism can be attributed to multiple interactions between the PA-MOP and the neonicotinoids, in which hydrogen bonding, π-π stacking and electrostatic interactions are the major interactions.
在这项工作中，首次成功合成了一种天然原花青素（PA）基磁性纳米多孔有机聚合物（命名为 PA-MOP）。PA-MOP 具有高亲水性表面、良好的磁响应性和对新烟碱类杀虫剂的高亲和力。它被用作一种先进的磁性吸附剂，用于从环境水样、桃汁和蜂蜜样品中提取四种新烟碱类杀虫剂（噻虫嗪、吡虫啉、噻虫胺和噻虫砜），然后进行 HPLC 分析。在最佳条件下，分析物在 S/N=3 时的检出限为水样品 0.02-0.08ng/mL、桃汁样品 0.03-0.10ng/mL 和蜂蜜样品 0.05-0.16ng/g。方法回收率为 80.0%-114.8%，相对标准偏差低于 6.8%。基质效应的值为-1.5%至-9.3%。基于理论计算，萃取机制可归因于 PA-MOP 和新烟碱类杀虫剂之间的多种相互作用，其中氢键、π-π 堆积和静电相互作用是主要相互作用。
