Abstract In this work, by introducing solvothermal method for generating Fe3O4 nanoparticles and “one-pot” method for synthesizing organic–inorganic hybrid monolithic vinyl functionalized Fe3O4 (Fe3O4@HM), a facile procedure was proposed for preparing poly(1-vinylimidazole) (PVIM) functionalized gold ion imprinted polymer based MNPs@IIP (MNPs@HM@PVIM-Au-IIP). The as-prepared magnetic nanocomposites were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and vibrating sample magnetometry (VSM), etc. After the optimum conditions, including solution pH, adsorption time and sample volume, eluent composition and volume, and elution time were investigated, this MNPs@IIP was employed as ion imprinted polymer magnetic solid phase extraction (II-MSPE) matrix for separation and enrichment of trace gold ions followed by inductively coupled plasma mass spectrometric (ICP-MS) determination with excellent selectivity and sensitivity, and strong anti-interference ability. These merits were benefited from the formation of hybrid monolithic interlayer enduing the resultant MNPs@HM@PVIM-Au-IIP with good chemical and mechanical stability, as well as the dimensional homogeneity due to the solvothermal-generated Fe3O4 nanoparticles as the cores. The applicability superiority of this MNPs@IIP was confirmed by the rapid and efficient extraction of trace level Au(III) in environment water, sediment, soil, coal and ore samples with satisfactory results. The reliability of this II-MSPE-ICP-MS method was also verified by using corresponding Certified Standard Reference materials and spiking recovery of the real samples analyzed.

中文翻译：

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混合整体辅助磁性离子印迹聚合物萃取结合 ICP-MS 测定环境和矿物样品中的痕量 Au(III)

摘要 在这项工作中，通过引入溶剂热法制备 Fe3O4 纳米颗粒和“一锅法”合成有机-无机杂化单片乙烯基官能化 Fe3O4（Fe3O4@HM），提出了一种制备聚（1-乙烯基咪唑）的简便方法（ PVIM）功能化金离子印迹聚合物基MNPs@IIP（MNPs@HM@PVIM-Au-IIP）。通过扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、傅里叶变换红外光谱 (FT-IR)、X 射线衍射 (XRD)、热重分析 (TGA) 和振动样品对所制备的磁性纳米复合材料进行表征对溶液pH、吸附时间和样品体积、洗脱液组成和体积、洗脱时间等最佳条件进行考察后，该 MNPs@IIP 被用作离子印迹聚合物磁性固相萃取 (II-MSPE) 基质，用于分离和富集痕量金离子，然后进行电感耦合等离子体质谱 (ICP-MS) 测定，具有优异的选择性和灵敏度，并具有很强的抗干扰性。 ——干扰能力。这些优点得益于混合单片中间层的形成，使所得 MNPs@HM@PVIM-Au-IIP 具有良好的化学和机械稳定性，以及由于溶剂热生成的 Fe3O4 纳米粒子作为核心而产生的尺寸均匀性。该MNPs@IIP在环境水、沉积物、土壤、煤和矿石样品中快速高效提取痕量Au(III)并获得满意结果，证实了该MNPs@IIP的适用性优越性。