You Linna, He Man, Chen Beibei, Hu Bin
Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China.
Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China.
J Chromatogr A. 2017 Nov 17;1524:57-65. doi: 10.1016/j.chroma.2017.10.001. Epub 2017 Oct 3.
In this work, zeolitic imidazolate framework-8 (ZIF-8)/poly (methyl methacrylate-ethyleneglycol dimethacrylate) (MMA-EGDMA) composite monolith was in situ synthesized on stir bar by one-pot polymerization. Compared with the neat monolith, ZIF-8/poly(MMA-EGDMA) composite monolith has larger surface area and pore volume. It also exhibits higher extraction efficiency for target phytohormones than poly(MMA-EGDMA) monolith and commercial polyethylene glycol (PEG) coated stir bar. Based on it, a method of ZIF-8/poly(MMA-EGDMA) monolith coated stir bar sorptive extraction (SBSE)-high performance liquid chromatography-ultraviolet detection (HPLC-UV) was established for the analysis of five phytohormones in apple and pear samples. The developed method exhibited low limits of detection (0.11-0.51μg/L), wide linear range (0.5-500μg/L) and good recoveries (82.7-111%), which demonstrated good application potential of the ZIF-8/monolith coated stir bar in trace analysis of organic compounds.
在本工作中，通过一锅法聚合在搅拌棒上原位合成了沸石咪唑酯骨架-8（ZIF-8）/聚（甲基丙烯酸甲酯-乙二醇二甲基丙烯酸酯）（MMA-EGDMA）复合整体柱。与纯整体柱相比，ZIF-8/聚（MMA-EGDMA）复合整体柱具有更大的表面积和孔体积。它对目标植物激素的萃取效率也高于聚（MMA-EGDMA）整体柱和商用聚乙二醇（PEG）涂层搅拌棒。基于此，建立了一种ZIF-8/聚（MMA-EGDMA）整体柱涂层搅拌棒吸附萃取（SBSE）-高效液相色谱-紫外检测（HPLC-UV）方法，用于分析苹果和梨样品中的五种植物激素。所建立的方法具有低检测限（0.11 - 0.51μg/L）、宽线性范围（0.5 - 500μg/L）和良好的回收率（82.7 - 111%），这表明ZIF-8/整体柱涂层搅拌棒在有机化合物痕量分析中具有良好的应用潜力。
