School of environmental science and engineering,Taiyuan University of technology
微波辅助反相乳液悬浮聚合法制备了一种磁性氧化石墨烯/双模板离子印迹聚合物(MA/MGO@DIIP),并研究了MA/MGO@DIIP对蔬菜中Cd(II)和Cu(II)残留的固相萃取性能。以Cu2+、Cd2+为双模板离子,AM为功能单体,GO为载体,Fe3O4为磁性组分固定在载体表面。采用SEM和FTIR进行表征。对萃取条件进行优化：洗脱液HCl的浓度为0.5 mol/L,体积为3 mL,样品浓度为10 μg/L,体积为5 mL,pH=7,上样和洗脱流速均为2 mL/min时,回收率最大。当添加2%的NaCl时可提高萃取效率。在混合基质的环境中,萃取效率几乎不受外界离子的干扰。在五次吸附解吸循环之后,萃取效率无显著影响。Cu2+和Cd2+的LOD分别为1.67%~5.41%和3.77%~8.33%,表明该方法具有良好的准确性和可靠性,是一种具有广泛应用前景的吸附剂。
Magnetic graphene oxide/double template ion imprinted polymer (MA/MGO@DIIP) was prepared by microwave-assisted inverse emulsion-suspension polymerization. Solid-phase extraction performance of Cd(II) and Cu(II) of MA/MGO@DIIP in vegetables was studied. Cu2+ and Cd2+ were used as template ions, AM as functional monomer, GO as carrier and Fe3O4 as magnetic component. The samples were characterized by SEM and FTIR. The extraction conditions were optimized as follows: the concentration of HCl in eluent was 0.5 mol/L, the volume was 3 mL, the concentration of sample was 10 μg/L, the volume was 5 mL, pH=7, the flow rate was 2 mL/min, the recovery rate was the highest. When 2% NaCl was added, the extraction efficiency could be improved. In the mixed matrix environment, the extraction efficiency is hardly affected by external ions. After five cycles of adsorption and desorption, the extraction efficiency had no significant effect. The LOD values of Cu2+ and Cd2+ were 1.67%~5.41% and 3.77%~8.33%, respectively, indicating that the method has good accuracy and reliability, and is a kind of adsorbent with wide application prospect.
李娜,祝方,梁文静,等. 微波MGO@DIIP对蔬菜中残留镉和铜的固相萃取性能研究[J]. 科学技术与工程, , ():复制