基于表面增强拉曼光谱技术的陈皮年份检测

发布时间：2018-08-31 12:30

【摘要】：采用表面增强拉曼光谱技术对8种不同储存年份的陈皮进行检测。测试分析了储存11年的陈皮样品于金膜、银纳米颗粒、金膜-银纳米颗粒增强基底上的拉曼光谱。在金膜-银纳米颗粒增强基底上的陈皮拉曼光谱特征峰最明显,对375、493、650cm-1等12处的拉曼特征峰进行初步归属分析,据此对陈皮的生化成分进行初步判断,并探讨了陈皮在金膜-银纳米颗粒基底上拉曼信号的增强机理。此外,通过分析比较8种不同年份陈皮的表面增强拉曼光谱信息,区分出不同存储年份的陈皮。根据峰值位置信息的变化,得出与存放5年及以下的陈皮相比,存放7年及以上的陈皮产生了某些新成分的结论。
[Abstract]:Surface enhanced Raman spectroscopy was used to detect 8 kinds of aged skins in different storage years. Raman spectra of the aged skin samples stored for 11 years on the gold film, silver nanoparticles, gold film and silver nanoparticles reinforced substrate were measured and analyzed. The characteristic peaks of Raman spectra of the pericarp on the gold film-silver nanoparticles enhanced substrate were the most obvious. The Raman characteristic peaks at 12 sites such as 375493650cm-1 were preliminarily assigned and the biochemical components of the pericarp were preliminarily judged. The enhancement mechanism of Raman signal on gold film-silver nanoparticles was discussed. In addition, by analyzing and comparing the surface enhanced Raman spectrum information of 8 different years' old peel, we can distinguish the different storage year's old skin. According to the change of peak position information, it is concluded that compared with the aged skins stored for 5 years or less, the aged skins stored for 7 years or more produce some new components.
【作者单位】：天津大学精密仪器与光电子工程学院精密测试技术及仪器国家重点实验室;北京大学物理学院人工微结构和介观物理国家重点实验室;南开大学电子信息与光学工程学院现代光学研究所光学信息技术科学教育部重点实验室;
【基金】：国家重点基础研究发展计划(2013CB328701) 国家自然科学基金优秀青年科学基金(61322508);国家自然科学基金青年基金(11504010,11504270)
【分类号】：R284.1;O657.37

【相似文献】