文献类型：期刊文献

英文题名：Amino-functional magnetic covalent organic framework as an effective adsorbent for the determination of neonicotinoids in food samples

作者：Zhang, Xinyue[1,2,3];Yang, Minli[1,3];Zhang, Feng[1,3];Wang, Xiujuan[1,3];Zhang, Feifang[2]

机构：[1]Chinese Acad Inspect & Quarantine, Inst Food Safety, Beijing 100176, Peoples R China;[2]East China Univ Sci & Technol, Sch Pharm, Shanghai 200237, Peoples R China;[3]Key Lab Food Qual & Safety State Market Regulat, Beijing 100176, Peoples R China

年份：2024

卷号：191

期号：4

外文期刊名：MICROCHIMICA ACTA

收录：;EI(收录号：20241315819937);WOS:【SCI-EXPANDED(收录号:WOS:001191306500001)】；

基金：The study was supported by the National Key Project of Research and Development Plan (2022YFF1100900).

语种：英文

外文关键词：Magnetic covalent organic framework; Bottom-up functionalization; Amino groups; Magnetic solid-phase extraction; Neonicotinoids; HPLC-MS

摘要：Recently, covalent organic frameworks have gained popularity in sample pretreatment. However, the application of covalent organic frameworks in the enrichment of hydrophilic compounds remains a challenge. Thus, a functionalized magnetic covalent organic framework equipped with amino groups was constructed using a bottom-up functionalization strategy. Considering the advantages of this novel adsorbent such as high porosity, large adsorption capacity, and hydrophilic surface, a sensitive magnetic solid-phase extraction coupled with high-performance liquid chromatography-tandem mass spectrometry method was established for the effective determination of neonicotinoids. This method exhibited good linearities with correlation coefficients ranging from 0.9983 to 0.9995, low detection limits in the range 0.003-0.009 ng g-1 and 0.001-0.013 ng mL-1, and limits of quantification in the range 0.010-0.031 ng g-1 and 0.004-0.044 ng mL-1. Furthermore, satisfactory repeatability with relative standard deviations <= 6.7% and spiked recoveries between 82.3 and 99.8% were obtained. This work not only provided a promising adsorbent for the sensitive determination of trace-level neonicotinoids but also represented a unique insight for effective enrichment of super hydrophilic hazards.