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  • Title: Rational selection of 4,4',4″-(1,3,5-triazine-2,4,6-triyl) trianiline-based covalent organic framework as adsorbent for effective co-extraction of aflatoxins, zearalenone and its metabolites from food and biological samples.
    Author: Wei D, Li J, Guo M, Xu J, Deng Q, Wang X.
    Journal: Food Chem; 2025 Jan 15; 463(Pt 1):141013. PubMed ID: 39243614.
    Abstract:
    Aflatoxins, zearalenone and its metabolites, as representative hazard mycotoxins cause adverse effects on food safety and human health. Developing a sensitive and reliable extraction and detection method is of great importance for monitoring their residue and exposure levels. In contrast to traditional trial-and-error selection steps, 4,4',4″-(1,3,5-triazine-2,4,6-triyl) trianiline covalent-bonding with 2,5-dihydroxyterephthalaldehyde, namely TAPT-OH-COF was screened as a potential adsorbent utilizing density functional theory calculations prior to the synthesis procedure. After experimental verification, magnetic TAPT-OH-COFs were prepared, characterized and applied for the extraction of aflatoxins, zearalenone and its metabolites from food and biological samples, coupled with high-performance liquid chromatography tandem mass spectrophy detection. Under the optimal conditions, the developed method exhibited low limits of quantification (0.05-0.50 μg/kg), satisfactory recoveries (75.8 %-110.9 %) and good precision with intraday and interday relative standard deviations (RSDs) not exceeding 12.2 %. This study may provide great potential for the selection of candidate adsorbents for multi-mycotoxins extraction from complex samples.
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