Measuring routine parameters of wine by ATR-MIR spectroscopy

In this paper, common parameters of wine are measured using attenuated total reflectance Fourier transform infrared spectrometer (ATR-FTIR). ATR cell is used which have the advantage of easy filling and cleaning. The parameters include sugar, alcohol, acid, SO2, sugar-free extract, which is routinely measured in the wine quality determination. Commercial wines (n=125) both red and white were analyzed using the ATR-FTIR spectrometer. Reference data were measured based on standard procedure (GB15038-2006) and performed by technical analyst. Using PLS calibration method samples' concentration can be predicted. The accuracy of quantification of main component such as total acidity, sugar, alcohol was excellent, with the measure error low than 1g/L. Some subdivision components are well, that concentration can be predicted in a lower accuracy. Based on the accuracy we obtained, the presented method can be used in winery widely as a fast method for measuring wine's content.