Fig. 6. Evolution of alcohol strength and titratable acidity in one fermentation run of
apple wine at 20 C with S. cerevisiae PF12, the predicted versus measured values of
alcohol strength (R2 ¼ 0.962, RMSEP ¼ 3.6 mL/L), and titratable acidity (R2 ¼ 0.972,
RMSEP ¼ 0.22 g/L) using the FT-NIRS models to monitor the fermentation process.