College of Chemistry, Liaoning University, No. 66 Chongshan Middle Road, Shenyang 110036, China.
College of Chemistry, Liaoning University, No. 66 Chongshan Middle Road, Shenyang 110036, China.
Food Chem. 2024 Jan 15;431:137149. doi: 10.1016/j.foodchem.2023.137149. Epub 2023 Aug 15.
The novel ILs@CNTs was synthesized by encapsulating task-specific ionic liquids (ILs) within carbon nanotubes (CNTs) derived from ZIF-67. These hybrid materials served as multifunctional adsorbents enabling simultaneous sorptive removal, sensitive detection, molecular sieve selection, and magnetic separation. In contrast to pristine CNTs, ILs@CNTs demonstrate significantly enhanced adsorption of phenylurea herbicides (PUHs). The complex interactions between ILs@CNTs and PUHs were comprehensively analyzed using a combination of experimental results and theoretical calculations. Furthermore, a magnetic solid phase extraction-high performance liquid chromatography (MSPE-HPLC) method was developed for the determination of multiple trace PUHs in real samples. The method exhibited lower detection limits (0.02-0.03 μg L) and higher enrichment factors (131 < EFs < 185). Interestingly, a portable lab-in-a-syringe device was developed to facilitate rapid on-site extraction and enrichment of PUHs. Additionally, the developed methods successfully applied in river water, tea drinks, and cucumber samples, highlighting its substantial potential for rapid PUH detection.
通过将任务特定的离子液体（ILs）封装在 ZIF-67 衍生的碳纳米管（CNTs）内，合成了新型 ILs@CNTs。这些混合材料可用作多功能吸附剂，实现同时吸附去除、灵敏检测、分子筛选择和磁分离。与原始 CNTs 相比，ILs@CNTs 对苯脲类除草剂（PUHs）的吸附能力显著增强。通过实验结果和理论计算的综合分析，研究了 ILs@CNTs 与 PUHs 之间的复杂相互作用。此外，还开发了一种基于磁性固相萃取-高效液相色谱（MSPE-HPLC）的方法，用于测定实际样品中多种痕量的 PUHs。该方法的检测限较低（0.02-0.03μg L），富集因子较高（131<EFs<185）。有趣的是，还开发了一种便携式注射器内实验室装置，以促进 PUHs 的快速现场提取和富集。此外，该方法还成功应用于河水、茶饮料和黄瓜样品中，突出了其在快速检测 PUHs 方面的巨大潜力。
