表面增强拉曼散射法检测联苯胺

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。

Surface-Enhanced Raman Scattering Detection of Benzidine

Au@PVP core-shell nanoparticles were prepared by the hydrothermal method. Benzidine molecules were absorbed onto the surface of Au@PVP core-shell nanoparticles through the hydrogen bonding interaction between benzidine and polyvinylpyrrolidone (PVP). Benzidine molecules could be highly sensitively detected by the electromagnetic enhancement effect of the inner-core Au nanoparticles under the optimal excitation wavelength and the appropriate pH value. The limit of detection (LOD) was 10-9 mol/L, which was nearly 103 times lower than the limit of detection of the gas chromatography (GC) method for surface drinking water described in the Environment Quality Standards for Surface Water.