Beijing Key Lab of Microanalytical Methods & Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Science Building D308, Beijing, 100084, China.
College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, China.
Anal Bioanal Chem. 2022 Jul;414(18):5585-5594. doi: 10.1007/s00216-022-04003-9. Epub 2022 Mar 14.
Three-dimensional porous graphene film (3DPGF) was fabricated on Zn fiber for solid-phase microextraction (SPME) through in-situ self-assembly strategy at room temperature. Fast electron transfer due to ionization of zinc induces reduction of graphene oxide and thus leads to the layer-by-layer interfacial deposition of graphene sheets, forming three-dimensional porous network morphology. The 3D interpenetrating porous structure could provide more available adsorption site for the target molecules and also enhance mass transfer efficiency in the extraction process. Therefore, the obtained 3DPGF fiber exhibited excellent performance when applied in the SPME of preconcentration and quantification of polychlorinated biphenyls (PCBs) in environment waters. The developed method showed a linear range from 1.0 ng L-1 and 200 ng L-1 with an acceptable correlation (R2=0.990). The limit of detection (LOD) and limit of quantification (LOQ) were found 0.03-0.2 ng L-1 and 0.1-0.8 ng L-1, respectively. The proposed method was applied in real water samples analysis with the recoveries ranging from 63.1 to 111.3%. The present study expanded the application of three-dimensional porous graphene materials in sample preparation and revealed its potential in SPME application.
通过室温下的原位自组装策略，在锌纤维上制备了用于固相微萃取（SPME）的三维多孔石墨烯膜（3DPGF）。由于锌的离子化导致快速电子转移，从而导致氧化石墨烯的还原，从而导致石墨烯片的逐层界面沉积，形成三维多孔网络形态。3D 互穿多孔结构可为目标分子提供更多可用的吸附位点，并增强萃取过程中的传质效率。因此，所获得的 3DPGF 纤维在环境水样中多氯联苯（PCBs）的预浓缩和定量的 SPME 中表现出优异的性能。所开发的方法在 1.0 ng L-1 和 200 ng L-1 之间呈现线性范围，具有可接受的相关性（R2=0.990）。检测限（LOD）和定量限（LOQ）分别为 0.03-0.2 ng L-1 和 0.1-0.8 ng L-1。该方法已应用于实际水样分析，回收率在 63.1%至 111.3%之间。本研究扩展了三维多孔石墨烯材料在样品制备中的应用，并揭示了其在 SPME 应用中的潜力。
