AbstractMagnetic knitting aromatic polymers (Fe3O4/KAPs) are introduced here as a new kind of sorbents. KAPs are hyper-cross-linked-polymers that were prepared via a Friedl-Crafts reaction from triphenylphosphine and benzene as building blocks. The Fe3O4/KAP composite was obtained by coprecipitation of KAP with magnetite nanoparticles. The resulting Fe3O4/KAP is shown to be a viable magnetic sorbent for various organic materials such as the phenylurea herbicides (PUHs), including metoxuron, monuron, chlortoluron, monolinuron and buturon, and also for various phthalates, polycyclic aromatic hydrocarbons and chlorophenols. The Fe3O4/KAP was characterized by means of Brunauer-Emmett-Teller surface area measurements, Fourier-transform infrared spectroscopy, thermogravimetry, X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Following desorption with acetonitrile, the analytes were quantified by using HPLC with UV detection. The effects of adsorbent dosage, extraction time, sample pH, ionic strength, desorption solvent and desorption time were optimized for the PUHs. Under optimal conditions, response is linear from 0.5–1.0 up to 50 ng·mL−1 for the five PUHs. Lower limits of detection range between 0.05 and 0.30 ng·mL−1. Other figures of merit include (a) high enrichment factors (60–297), (b) good recoveries (91.8–106.5%), and (c) relative standard deviations of <8.4%. The method was successfully applied to analysis of the PUHs in real samples (bottled mixed juice, milk and soymilk). The results indicate that such Fe3O4/KAPs have a wide application scope as an adsorbent for use in magnetic solid phase extraction. Graphical abstractA magnetic knitting aromatic polymer based nanocomposite (Fe3O4/KAP) was prepared by a one-pot method and explored as an absorbent for magnetic solid-phase extraction (MSPE) of phenylurea herbicides (PUHs) from bottled mixed juice, milk and soymilk samples before quantitation by HPLC with UV detection.

中文翻译：

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一种磁性针织芳香聚合物作为一种新型吸附剂，用于有机物的固相萃取

摘要 本文介绍了磁性编织芳香族聚合物（Fe3O4/KAPs）作为一种新型吸附剂。KAPs 是超交联聚合物，它是通过弗里德-克拉夫茨反应从三苯基膦和苯作为构建单元制备的。Fe3O4/KAP 复合材料是通过 KAP 与磁铁矿纳米颗粒的共沉淀获得的。所得的 Fe3O4/KAP 被证明是一种适用于各种有机材料的磁性吸附剂，例如苯脲类除草剂 (PUH)，包括甲氧脲、单脲、氯脲、单利脲和丁脲，以及各种邻苯二甲酸盐、多环芳烃和氯酚。Fe3O4/KAP 通过Brunauer-Emmett-Teller 表面积测量、傅里叶变换红外光谱、热重分析、X 射线衍射、扫描电子显微镜和透射电子显微镜。用乙腈解吸后，分析物通过使用带紫外检测的 HPLC 进行定量。对 PUH 的吸附剂用量、提取时间、样品 pH 值、离子强度、解吸溶剂和解吸时间的影响进行了优化。在最佳条件下，五个 PUH 的响应在 0.5–1.0 至 50 ng·mL-1 之间呈线性关系。检测范围的下限介于 0.05 和 0.30 ng·mL-1 之间。其他优点包括 (a) 高富集因子 (60–297)，(b) 良好的回收率 (91.8–106.5%)，以及 (c) <8.4% 的相对标准偏差。该方法已成功应用于实际样品（瓶装混合果汁、牛奶和豆浆）中 PUH 的分析。结果表明，这种 Fe3O4/KAPs 作为吸附剂用于磁固相萃取具有广泛的应用范围。图形摘要通过一锅法制备了一种磁性针织芳香聚合物基纳米复合材料（Fe3O4/KAP），并将其用作从瓶装混合果汁、牛奶和豆奶样品中磁性固相萃取（MSPE）苯脲除草剂（PUHs）的吸收剂在通过 HPLC 和 UV 检测进行定量之前。