表面增强拉曼散射法检测联苯胺  

Surface-Enhanced Raman Scattering Detection of Benzidine

作　　者：徐宁宁[1] 孙文[1] 张芹[1] XU Ningning;SUN Wen;ZHANG Qin(College of Food and Biological Engineering, Jimei University, Xiamen 361021, China)

机构地区：[1]集美大学食品与生物工程学院,福建厦门361021

出　　处：《食品科学》2017年第12期229-233,共5页Food Science

基　　金：国家自然科学基金青年科学基金项目(21101073);福建省自然科学基金计划项目(2011J01053);福建省教育厅杰青培育项目(JA11147)

摘　　要：利用水热法合成聚乙烯吡咯烷酮包金(Au@PVP)核壳纳米粒子,通过氢键的作用使联苯胺吸附在Au@PVP核壳纳米粒子表面增强拉曼基底上,优化激发光波长、选择合适的pH值条件,利用其内核金纳米粒子的等离子共振效应实现了对联苯胺分子的高灵敏度表面增强拉曼检测,检测限达到10^(-9)mol/L。此值与GB 3838—2002《地表水环境质量标准》中用气相色谱法检测集中式生活饮用地表水源的特定分析方法检测联苯胺的检测限相比,降低了接近3个数量级。Au@PVP core-shell nanoparticles were prepared by the hydrothermal method.Benzidine molecules wereabsorbed onto the surface of Au@PVP core-shell nanoparticles through the hydrogen bonding interaction betweenbenzidine and polyvinylpyrrolidone(PVP).Benzidine molecules could be highly sensitively detected by the electromagneticenhancement effect of the inner-core Au nanoparticles under the optimal excitation wavelength and the appropriate pHvalue.The limit of detection(LOD)was10-9mol/L,which was nearly103times lower than the limit of detection of the gaschromatography(GC)method for surface drinking water described in the Environment Quality Standards for Surface Water.

关 键 词：聚乙烯吡咯烷酮包金(Au@PVP)核壳纳米粒子 联苯胺 表面增强拉曼 

分 类 号：O657.37[理学—分析化学]