State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, China.
Talanta. 2012 Oct 15;100:32-7. doi: 10.1016/j.talanta.2012.07.080. Epub 2012 Aug 4.
A novel surface-enhanced Raman scattering (SERS) sensor made up of a graphene and silver nanocomposite was developed for detecting prohibited colorants in food. This SERS platform exhibited an excellent enrichment effect between the colorant molecules and the graphene and an ability to enhance the Raman spectra of the silver nanoparticles. Detection of different concentrations of each prohibited colorant was carried out by SERS measurements on this novel substrate. In addition, from the SERS spectra of a mixture of four kinds of prohibited colorants, it was possible to easily distinguish each colorant by its characteristic peaks. A control experiment was also performed to compare the SERS spectra obtained using the graphene/silver nanocomposite substrate with spectra obtained using Ag alone as a substrate. The results showed that the SERS nanocomposite was better for detecting prohibited colorants. The proposed method has advantages in terms of providing a simple and rapid method for the sensitive analysis of prohibited additive colorants in food.
一种由石墨烯和银纳米复合材料组成的新型表面增强拉曼散射（SERS）传感器被开发出来，用于检测食品中的禁用着色剂。该 SERS 平台在着色剂分子与石墨烯之间表现出了优异的富集效果，并且能够增强银纳米粒子的拉曼光谱。通过在这种新型基底上进行 SERS 测量，对不同浓度的每种禁用着色剂进行了检测。此外，从四种禁用着色剂的混合物的 SERS 光谱中，可以通过其特征峰轻松区分每种着色剂。还进行了对照实验，以比较使用石墨烯/银纳米复合材料基底获得的 SERS 光谱与单独使用 Ag 作为基底获得的光谱。结果表明，SERS 纳米复合材料更适合检测禁用着色剂。该方法在提供用于食品中禁用添加剂着色剂的灵敏分析的简单快速方法方面具有优势。
