A water resistant solid-phase microextraction fiber with high selectivity prepared by a metal organic framework with perfluorinated pores
organic frameworks(FMOF)and a polyimide(PI)composite strategy.As an auxiliary material,PI was expected to help FMOF particles form well-knit film on the surface of stainless steel wire and reinforce the coating,and FMOF was expected to afford a special structure to absorb,extract and enrich.Furthermore,it was explored for the headspace SPME(HS-SPME)of six volatile aromatic compounds(VACs)from water samples followed by gas chromatographic(GC)separation with flame ionization detection.Under the optimized conditions,the fiber afforded wide linear ranges(1–1000μg L-1),low detection limits(0.15–0.9μg L-1)and acceptable repeatability(<4.6%)and reproducibility(<7.3%).The FMOF@PI coated fiber not only offered large enhancement factors for benzene(1227)but also exhibited high extraction selectivity for benzene to other benzene homologues,hydrocarbons and phenols; for example,the extraction ratio of benzene to toluene,n-hexane and phenol could be as high as 10.2,64.1 and 32.3,respectively.Moreover,the FMOF@PI-coated fiber afforded good thermal,water and organic solvent stabilities,and a long lifetime(over 200 times).The developed method was successfully applied to the determination of VACs in wastewater samples.
Solid-phase microextraction Metal organic framework Selective extraction Fluorine-lined Hydrophobic
Jiajia Niu Zhongyue Li Huijuan Yang Changwen Ye Chen Chen Dong Li Jun Xu Li Fan
Zhengzhou Tobacco Research Institute of China National Tobacco Corporation,Zhengzhou,Henan 450001,Ch Department of Physics-Chemistry,Henan Polytechnic University,Jiaozuo,Henan 454000,China
国内会议
北京
英文
16-23
2017-11-01（万方平台首次上网日期，不代表论文的发表时间）