金属-有机骨架MIL-101(Cr)掺杂聚合物整体柱的制备及其用于酚类化合物的在线固相萃取

Preparation of metal-organic framework MIL-101(Cr) incorporated polymer monolithic column for on-line solid-phase extraction of phenols

制备了金属-有机骨架(MOF) MIL-101(Cr)掺杂聚合物整体柱,建立了在线固相萃取-高效液相色谱检测水中4-硝基苯酚、2-硝基苯酚、3-甲基苯酚和2,4-二氯苯酚的方法。考察了样品溶液pH值、上样时间、上样流速和解吸时间对酚类化合物萃取效果的影响。在最优萃取条件下,采用制备的整体柱检测水中酚类化合物,其富集因子高,线性范围宽,精密度好,检出限低,适用于水中酚类化合物的检测。制备掺杂聚合物整体柱是促进和拓宽MOFs在线固相萃取应用的有效方法之一。

A metal-organic framework (MOF) MIL-101(Cr) incorporated polymer monolithic column was prepared,and a method was developed for the determination of 4-nitrophenol,3-methylphenol,2-nitrophenol and 2,4-dichlorophenol in water samples by on-line solid phase extraction (SPE) coupled with high performance liquid chromatography (HPLC).Effects of sample solution pH values,sample loading time,sample loading flow rates and desorption time on the on-line SPE of phenols were investigated.Under the optimized extraction conditions,large enhancement factors,wide linearity range,good precisions and low limits of detection were achieved.The results showed that the incorporation of MOFs in porous polymer monolith to fabricate MOF-incorporated monolith is one of the best ways to promote and expand the application of MOFs in on-line SPE.