石墨烯复合材料固相萃取环境水样中的亚甲基蓝

摘要

制备了磁性石墨烯-介孔二氧化硅(G/SiO2/Fe3O4)复合材料,并将其作为固相萃取的吸附剂,建立了水样中亚甲基蓝的分离富集方法.对固相萃取条件如pH、样品溶液的体积、上样速率、材料用量、洗脱剂的种类及体积等条件进行了优化.在最优条件下,方法的检测限(S/N=3)为10 μg/L,加标回收率为94.3％ ～ 95.4％.该方法可应用于环境水样中亚甲基蓝的检测.%Synthesis of magnetic graphene mesoporous silica (G/SiO2/Fe3O4) composites and a new method using a column packed with G/SiO2/Fe3 O4 as sorbent was developed for the separation and preconcentration of Methylene Blue (MB).Some effective parameters on the extraction such as pH,sample volume,flow rates,amounts used of adsorbents,eluent type and its volume were selected and optimized.Under the optimum condition,the qualitative limit (S/N =3) for MB were found to be 10 μg/L,the recoveries for the analytes were in the range of 94.3％～95.4％.The proposed method was showed to be an effective approach for determination of MB in environment water samples.