by Keyword: Thermal analysis
Fernandes, RP, Ekawa, B, Ferreira, LT, Carvalho, ACS, Freire, RT, Caires, FJ, (2022). Classification of beer by thermogravimetric and chemometric techniques Journal Of Thermal Analysis And Calorimetry 147, 3063-3069 
Thermogravimetric (TG) technique combined with partial least squares discriminant analysis (PLS-DA) was applied to distinguish five pilsner beers from different brands (Antarctica, Bohemia, Brahma, Budweiser and Imperio). Herein, we develop a TG methodology that use a small volume (40 µL), and an analysis time of 25 min. The major gases evolved during the thermal decomposition were water, ethanol and carbon dioxide. Energy-dispersive X-ray spectrometer of the ashes detected the major constituents: oxygen, sodium, magnesium, silicon, phosphorus, sulfur, chlorine, potassium and calcium. TG and PLS-DA technique together were able to classify the five brands with a classification rate for the model of 97% with a confidence interval of 92–99%, achieving high sensitivity and specificity between the calibration, cross-validation and predicted results.
JTD Keywords: chemometrics, thermal analysis, Beer, Chemometrics, Thermal analysis
