کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5133086 | 1492051 | 2018 | 7 صفحه PDF | دانلود رایگان |
- Flower-shaped silver nanostructures obtained were used as stable SERS substrates with high SERS activity.
- SERS spectroscopy of four different food colorants were analyzed and the characteristic bands were identified.
- An improved principle component analysis (PCA) was used for four different food colorants detection, at concentrations down to about 10â8Â M.
Surface Enhanced Raman Scattering (SERS) spectroscopy technology is widely used in materials analysis, environmental monitoring, biomedical, food security and other fields. Flower-shaped silver nanoparticles have been successfully synthesized by a simple aqueous phase silver nitrate reduction by ascorbic acid in the presence of polyvinylpyrrolidone (PVP) surfactant. The nanoparticles diameters were adjusted from 450 to 1000 nm with surface protrusions up to 10-25 nm. The flower-shaped silver nanostructures obtained were used as stable SERS substrates with high SERS activity for detecting Rhodamine 6G (R6G), at a concentration of only 10â9 mol/L, where the SERS signal is still clear. SERS spectroscopy of four different food colorants (e.g. food blue, tartrazine, sunset yellow, acid red) were analysed and the characteristic bands were identified. An improved principle component analysis (PCA) was used for four different food colorants detection, at concentrations down to about 10â8 mol/L. Thus, the LOD of food blue, tartrazine, sunset yellow and acid red are 79.285 μg/L, 5.3436 μg/L, 45.238 μg/L and 50.244 μg/L, respectively.
Journal: Food Chemistry - Volume 241, 15 February 2018, Pages 427-433