Key Laboratory for Analytical Science of Food Safety and Biology (Ministry of Education & Fujian Province), College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350116, China.
Department of Chemical and Biological Engineering, Minjiang Teachers College, Fuzhou, Fujian, 350108, China.
Talanta. 2022 Jun 1;243:123380. doi: 10.1016/j.talanta.2022.123380. Epub 2022 Mar 18.
Rapid and convenient preparation of covalent organic framework (COF) coated fibers is of great significance to solid-phase microextraction (SPME) technology. In this work, a novel chemical preparation strategy was established for rapid fabrication of β-ketoenamine-linked COF coatings, in which clay-like starting materials of COFs were first wrapped on the fiber surface through self-viscosity and further fixed on the fiber in an oven via chemical bonding. Based on this strategy, four different COF (TpTph, TpPa-1, TpBD and TpTpb) coated fibers was fabricated within 1 h, which is very rapid compared to the recently reported research. Moreover, the strategy also demonstrates the good general applicability for COF fiber preparation. Subsequently, the TpTph coated fiber was used to develop a new SPME method for gas chromatography-tandem mass spectrometry (GC-MS/MS) of trace phthalic acid esters (PAEs) in environmental water. The developed analytical method compared to the previous SPME methods for PAEs based on other sorbents possesses low limits of detection (LODs, 0.02-0.08 ng L), and better or comparable precision (RSD ≤9.4%, n = 6), and relatively short extraction time. Furthermore, the trace PAEs (0.27-11.62 ng L) in the real water samples were successfully detected with recoveries of 82.2-117.5%. The above results indicates that the proposed fiber preparation strategy is reliable and opens a potential avenue for rapid and facile fabrication of COF coated fibers.
快速便捷地制备共价有机骨架（COF）涂层纤维对于固相微萃取（SPME）技术具有重要意义。在这项工作中，建立了一种新的化学制备策略，用于快速制备β-酮亚胺键合的 COF 涂层，其中 COF 的粘土状起始材料首先通过自粘性包裹在纤维表面上，并通过化学键合在烤箱中进一步固定在纤维上。基于该策略，在 1 小时内制备了四种不同的 COF（TpTph、TpPa-1、TpBD 和 TpTpb）涂层纤维，与最近报道的研究相比，这非常迅速。此外，该策略还证明了 COF 纤维制备的良好通用性。随后，将 TpTph 涂层纤维用于开发一种新的 SPME 方法，用于气相色谱-串联质谱（GC-MS/MS）分析环境水中痕量邻苯二甲酸酯（PAEs）。与基于其他吸附剂的先前 SPME 方法相比，该方法具有较低的检出限（LOD，0.02-0.08 ng L）、更好或可比的精密度（RSD≤9.4%，n=6）和相对较短的萃取时间。此外，成功检测到真实水样中的痕量 PAEs（0.27-11.62 ng L），回收率为 82.2-117.5%。上述结果表明，所提出的纤维制备策略是可靠的，并为快速简便地制备 COF 涂层纤维开辟了一条新途径。
