Rapid measurement of phenolics compounds in red wine using raman spectroscopy. http://dx.doi.org/10.1109/TIM.2010.2051611

Abstract

This paper presents the development of a new method to measure the main phenolic compounds found in Cabernet Sauvignon red wines. A portable Raman spectrometer was used for this purpose, providing scattering spectra to quantitatively analyze the samples and determining the concentration of compounds of interest. Raman spectra were obtained from wine samples corresponding to different seasons, vineyards and harvests. The subsequent model calibration was based on reference analytical values obtained using standard laboratory techniques. Several pre-processing and correlation methods were applied to the data in order to adjust models for polyphenols, anthocyanins and tannins, and also to reduce the effect of fluorescence. Optimization of the models was carried out using R2 and RMSEV indices. Correlations of R2=0.895 and RMSEV=5.55 mg/lt were obtained, showing the potential of this technique for field measurements.