石墨烯复合材料固相萃取环境水样中的亚甲基蓝

Application of graphene composites for the SPE clean-up of Methylene Blue from environment water samples

制备了磁性石墨烯-介孔二氧化硅(G/SiO_2/Fe_3O_4)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p H、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10μg/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/Fe3O4 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 con- dition, the qualitative limit （ S/N = 3） for MB were found to be 10μg/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.