A water compatible magnetic molecularly imprinted nanocomposite for the class-selective enrichment of quinoxaline-1,4-dioxides in environmental water.

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials Pub Date : 2024-10-15 DOI:10.1039/d4ay01250j

Mengmeng Zhang, Wei Zhou, Qingqing Wang, Ning Wang, Xin Wang, Youping Liu, Xin Di

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Abstract

In this work, a novel water compatible core-shell magnetic molecularly imprinted nanocomposite (Fe₃O₄-COOH@MIPs) was synthesized in an acetonitrile-water reaction system by adopting carboxyl group-functionalized Fe₃O₄ nanoparticles as the magnetic core, olaquindox as the template molecule and acrylamide as the functional monomer. The resulting Fe₃O₄-COOH@MIPs was characterized and applied as an adsorbent for magnetic solid-phase extraction (MSPE) of three quinoline-1,4-dioxides (QdNOs). The Fe₃O₄-COOH@MIPs possessed strong magnetic responsiveness, fast adsorption equilibrium rate (equilibrium within 5 min) and excellent selectivity. By coupling Fe₃O₄-COOH@MIPs based MSPE with high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS), good linearity (R² ≥ 0.9985) and low limits of detection (0.83-5.0 ng L^-1) for QdNOs were obtained. Finally, the proposed method was applied to determine trace QdNOs in environmental water samples, and the recoveries were in the range of 68.08-99.88% with RSD less than 12.5%.

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用于环境水中喹喔啉-1,4-二氧杂环类选择性富集的水兼容磁性分子印迹纳米复合材料。

本研究以羧基官能化的Fe3O4纳米粒子为磁芯，以奥拉喹喔为模板分子，以丙烯酰胺为功能单体，在乙腈-水反应体系中合成了一种新型水兼容核壳磁性分子印迹纳米复合材料（Fe3O4-COOH@MIPs）。对所得到的 Fe3O4-COOH@MIPs 进行了表征，并将其作为一种吸附剂用于三种喹啉-1,4-二氧杂环（QdNOs）的磁性固相萃取（MSPE）。Fe3O4-COOH@MIPs具有较强的磁响应性、较快的吸附平衡速率（5分钟内达到平衡）和优异的选择性。通过将基于 Fe3O4-COOH@MIPs 的 MSPE 与高效液相色谱-串联质谱（HPLC-MS/MS）联用，获得了 QdNOs 的良好线性关系（R2 ≥ 0.9985）和较低的检出限（0.83-5.0 ng L-1）。将该方法用于环境水样中痕量QdNOs的检测,回收率为68.08%～99.88%,RSD小于12.5%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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