Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou, P. R. China.
J Sep Sci. 2020 Jun;43(11):2240-2246. doi: 10.1002/jssc.201901118. Epub 2020 Mar 29.
A functional stainless steel microextraction fiber easily prepared by in situ growing metal-organic framework UiO-66 was presented and used for high-performance analysis of polycyclic musks. Via the robust Ag-SH bonding reaction, mercaptoacetic acid was easily anchored on Ag film to provide carboxyl group on the stainless steel fiber, then in situ grown UiO-66 was fulfilled via the coordination reaction between Zr and carboxyl group. Good characteristics including large surface area, high thermal stability, and good adsorption property were achieved. Sensitive detection limits (0.015-0.040 ng/L) were achieved for polycyclic musks by coupling with gas chromatography with mass spectrometry, and it could be stable enough for 150 extraction cycles without a significant loss of extraction efficiency. Compared with the classical commercial fibers, 2.2-11.4 times higher enhancement factors were shown. Applied to the analysis of fortified river water samples, five typical polycyclic musks were well detected with the recoveries of 90.2-101.8%, respectively. It showed a facile approach for preparing stainless steel microextraction fiber via chemically bonding in situ grown metal-organic framework for high-performance enrichment.
一种功能化的不锈钢微萃取纤维，通过原位生长金属有机骨架 UiO-66 很容易制备，并用于多环麝香的高性能分析。通过牢固的 Ag-SH 键合反应，巯基乙酸很容易锚定在 Ag 膜上，在不锈钢纤维上提供羧基，然后通过 Zr 和羧基之间的配位反应原位生长 UiO-66。实现了大比表面积、高热稳定性和良好吸附性能等良好特性。通过与气相色谱-质谱联用，对多环麝香进行了灵敏检测（0.015-0.040ng/L），在 150 次萃取循环中仍能保持足够的稳定性，萃取效率没有明显损失。与经典的商业纤维相比，显示出 2.2-11.4 倍更高的增强因子。将其应用于加标河水样品的分析，对五种典型的多环麝香进行了很好的检测，回收率分别为 90.2-101.8%。该方法为通过化学键合原位生长金属有机骨架用于高性能富集制备不锈钢微萃取纤维提供了一种简便的方法。
