基于Fe_3O_4的MOFs的制备及用于螺旋藻中多环芳烃的分析

Synthesis of Fe_3O_4@HKUST magnetic composites for magnetic solid phase extraction of PAHs in Spirulina samples

本文利用水热法合成Fe_3O_4纳米粒子,并通过层层自组装的方法合成以Fe_3O_4为核、金属-有机骨架(metalorganic frameworks,MOFs)为壳的多功能核-壳磁性微球Fe_3O_4@HKUST。通过FT-IR、XRD、SEM、TEM等手段对Fe_3O_4@HKUST进行表征,并以该复合材料为MSPE的吸附剂用于螺旋藻中的PAHs的富集。同时本文还优化了吸附剂用量、萃取时间、洗脱剂种类以及洗脱时间,在最佳条件下,方法定量限为0.031-0.49μg/L,回收率为75.4%-97.9%。

Fe3O4 nanoparticles were synthesized by solvothermal reaction, and then a novel multifunctional magnetic core@MOF shell microspheres, i.e. Fe3O4@HKUST, were fabricated by a versatile layer-by-layer strategy, and char- acterized with FT-IR, XRD, SEM, TEM etc. Fe3O4@HKUST MNPs were used as absorbents to preconcentrate PAHs in Spirulina sample. Various parameters affecting MSPE were optimized systematically. Under the optimum conditions, the limits of detection of the method were between 0.031 and 0.49 μg/L , the recoveries were in the range of 75.4% to 97.9%.