Wei Dan, Zhang Can, Pan Ao, Guo Ming, Lou Chaoyan, Zhang Ju, Wang Xu, Wu Huizhen
College of Bioscience and Engineering, Hebei University of Economics and Business, Shijiazhuang 050061, China.
Hangzhou Medical College, Hangzhou, 310053, ChinaZhejiang, 311300, China.
Food Chem X. 2022 May 24;14:100346. doi: 10.1016/j.fochx.2022.100346. eCollection 2022 Jun 30.
Three covalent organic polymers (COPs) were successfully fabricated by room-temperature solvent-free mechanochemical grinding method between 1,3,5-triformylphloroglucinol (TP) and -phenyl enediamine (COP1), benzidine (COP2), 4, 4″-diamino-p-terphenyl (COP3), and followed by coprecipitation on the surface of FeO nanoparticles to form three corresponding magnetic Tp-series COPs. The fabricated magnetic COPs were evaluated and then applied for the extraction of phthalate esters from food samples before gas chromatography-tandem spectrometry analysis. Magnetic COP2 exhibited the highest extraction efficiency, which can be attributed to its larger pore size, and its strong hydrophobic and π-π interactions with phthalate esters. The method possessed good linearity (10-1000 μg·kg), high sensitivity (0.29-2.59 µg·kg for LODs and 0.97-8.63 µg·kg for LOQs), and satisfactory recoveries (70.2-108.1%) with relative standard deviations lower than 5.2%. This method has potentials for high efficient separation/preconcentration of hydrophobic phthalate esters from foods.
通过1,3,5-三(甲酰基)间苯三酚(TP)与对苯二胺(COP1)、联苯胺(COP2)、4,4″-二氨基对三联苯(COP3)在室温无溶剂机械化学研磨法下成功制备了三种共价有机聚合物(COPs)，随后在FeO纳米颗粒表面共沉淀形成三种相应的磁性Tp系列COPs。对制备的磁性COPs进行了评估，并将其应用于食品样品中邻苯二甲酸酯的萃取，然后进行气相色谱-串联质谱分析。磁性COP2表现出最高的萃取效率，这可归因于其较大的孔径以及与邻苯二甲酸酯的强疏水和π-π相互作用。该方法具有良好的线性(10 - 1000 μg·kg)、高灵敏度(检测限为0.29 - 2.59 μg·kg，定量限为0.97 - 8.63 μg·kg)和令人满意的回收率(70.2 - 108.1%)，相对标准偏差低于5.2%。该方法具有从食品中高效分离/预富集疏水性邻苯二甲酸酯的潜力。
