Discrimination of sweeteners based on the refractometric analysis

19th International School on Condensed Matter Physics: Advances in Nanostructured Condensed Matter: Research and Innovations

Bodurov, I.^1 ; Vlaeva, I.^2 ; Viraneva, A.^1 ; Yovcheva, T.^1

Department of Experimental Physics, Plovdiv University Paisii Hilendarski, 24 Tsar Assen str., Plovdiv

4000, Bulgaria^1

Department of Mathematics and Physics, University of Food Technologies, 26 Maritsa blvd., Plovdiv

4002, Bulgaria^2

关键词: Artificial sweeteners;    Diffraction orders;    Dispersion characteristics;    Dynamic monitoring;    Experimental uncertainty;    Saccharin sodium;    Three-wavelengths;    Total internal reflections;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/794/1/012033/pdf
DOI  :  10.1088/1742-6596/794/1/012033

来源: IOP

【 摘 要 】

In the present work, the refractive characteristics of aqueous solutions of several sweeteners are investigated. These data in combination with ones from other sensors should find application for brief determination of sweeteners content in food and dynamic monitoring of food quality. The refractive indices of pure (distilled) water and aqueous solutions of several commonly used natural and artificial sweeteners (glucose, fructose, sucrose, lactose, sorbitol [E420], isomalt [E953], saccharin sodium [E950], cyclamate sodium and glycerol [E422]) with 10 wt.% concentration are accurately measured at 405 nm, 532 nm and 632.8 nm wavelengths. The measurements are carried out using three wavelength laser microrefractometer based on the total internal reflection method. The critical angle is determined by the disappearance of the diffraction orders from a metal grating. The experimental uncertainty is less than ±0.0001. The dispersion dependences of the refractive indices are obtained using the one-term Sellmeier model. Based on the obtained experimental data additional refractive and dispersion characteristics are calculated.