AbstractA magnetic covalent organic framework (Fe3O4@COF) with core–shell structure was fabricated at room temperature and used as an adsorbent for magnetic solid-phase extraction of polar endocrine-disrupting phenols (4-n-nonylphenol, 4-n-octylphenol, bisphenol A and bisphenol AF). The sorbent was characterized by transmission electron microscopy, FTIR, powder X-ray diffraction and other techniques. The main parameters governing the extraction efficiency were optimized. The phenols were quantified by HPLC with fluorometric detection. The method has attractive features such as low limits of detection (0.08–0.21 ng.mL−1), wide linear ranges (0.5–1000 ng.mL−1), and good repeatability (intra-day: 0.39%–4.99%; inter-day: 1.57%–5.21%). Satisfactory results were obtained when the developed method was applied to determine the four target pollutants in real world drink samples with spiked recoveries over the range of 81.3~118.0%. This indicates that the method is a powerful tool for the enrichment and determination of endocrine-disrupting phenols in drink samples. Graphical abstractA magnetite based covalent organic framework (Fe3O4@COFs) was synthesized with TPAB, TPA and Fe3O4. It was used for magnetic solid-phase extraction of endocrine-disrupting phenols from plastic-packaged tea drink samples coupled with liquid chromatography (LC) for determination.

中文翻译：

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核壳结构的磁性共价有机骨架（Fe3O4@COF 型）作为吸附剂，用于在通过 HPLC 定量之前对内分泌干扰酚进行固相萃取

摘要 在室温下制备了具有核壳结构的磁性共价有机骨架 (Fe3O4@COF)，并将其用作磁性固相萃取干扰内分泌的极性酚类（4-n-壬基苯酚、4-n-辛基苯酚、双酚 A 和双酚 AF)。通过透射电子显微镜、FTIR、粉末X射线衍射等技术对吸附剂进行了表征。优化了控制提取效率的主要参数。酚类通过具有荧光检测的 HPLC 进行定量。该方法具有检测限低（0.08-0.21 ng.mL-1）、线性范围宽（0.5-1000 ng.mL-1）和良好的重复性（日内：0.39%-4.99%；日间：1.57%–5.21%）。将所开发的方法应用于测定实际饮料样品中的四种目标污染物时，获得了令人满意的结果，加标回收率在 81.3~118.0% 的范围内。这表明该方法是富集和测定饮料样品中干扰内分泌的酚类物质的有力工具。图形摘要用 TPAB、TPA 和 Fe3O4 合成了基于磁铁矿的共价有机骨架 (Fe3O4@COFs)。用于塑料包装茶饮料样品中内分泌干扰酚的磁性固相萃取，结合液相色谱 (LC) 进行测定。图形摘要用 TPAB、TPA 和 Fe3O4 合成了基于磁铁矿的共价有机骨架 (Fe3O4@COFs)。用于塑料包装茶饮料样品中内分泌干扰酚的磁性固相萃取，结合液相色谱 (LC) 进行测定。图形摘要用 TPAB、TPA 和 Fe3O4 合成了基于磁铁矿的共价有机骨架 (Fe3O4@COFs)。用于塑料包装茶饮料样品中内分泌干扰酚的磁性固相萃取，结合液相色谱 (LC) 进行测定。