School of Food Engineering, Ludong University, Yantai, Shandong 264025, PR China; Institute of Bionanotechnology, Yantai Key Laboratory of Nanoscience and Technology for Prepared Food, Yantai Engineering Research Center of Green Food Processing and Quality Control, Yantai, Shandong 264025, PR China.
School of Food Engineering, Ludong University, Yantai, Shandong 264025, PR China.
J Chromatogr A. 2024 Aug 30;1731:465180. doi: 10.1016/j.chroma.2024.465180. Epub 2024 Jul 21.
Novel magnetic covalent organic frameworks (COFs) were prepared by one-pot synthetic strategy and employed as an efficient adsorbent for magnetic solid-phase extraction (MSPE) of naphthaleneacetic acid (NAA) in food samples. Depending on the predesigned the hydrogen bonding, π-π and hydrophobic interactions of magnetic COFs, the efficient and selective extraction process for NAA was achieved within 15 min. The magnetic COFs adsorbent combined with HPLC-UV was devoted to develop a novel quantitative method for NAA in complex food. The method afforded good coefficient in range of 0.002-10.0 µg mL and low limit of detection was 0.0006 µg mL. And the newly established method afforded less adsorbent consumption, wider linearity and lower LODs than the reported analytical methods. Ultimately, the method was successfully applied to determine NAA in fresh pear, tomato and peach juice. The magnetic COFs based MSPE coupled with HPLC-UV method provided a simple, efficient and dependable alternative to monitor trace NAA in food samples.
新型磁性共价有机框架（COFs）通过一锅合成策略制备，并用作食品样品中萘乙酸（NAA）的磁性固相萃取（MSPE）的有效吸附剂。基于磁性 COFs 的预设计氢键、π-π 和疏水相互作用，实现了 NAA 的高效和选择性萃取过程，时间为 15 分钟。将磁性 COFs 吸附剂与 HPLC-UV 结合，开发了一种用于复杂食品中 NAA 的新型定量方法。该方法在 0.002-10.0 µg mL 的范围内具有良好的线性度，检测限低至 0.0006 µg mL。与已报道的分析方法相比，新建立的方法具有更少的吸附剂消耗、更宽的线性范围和更低的检测限。最终，该方法成功应用于新鲜梨、番茄和桃汁中 NAA 的测定。基于磁性 COFs 的 MSPE 与 HPLC-UV 方法相结合，为监测食品样品中的痕量 NAA 提供了一种简单、高效和可靠的替代方法。
