values in Table 1. The large CV values of alcohol strength (67.6%,
58.7%, respectively for calibration and prediction sets) and titratable
acidity (32.7%, 24.3%, respectively for calibration and prediction
sets) were possibly related to different fermentation
conditions being studied. Therefore, the variability of sample data
in both calibration and prediction sets was considered suitable for
developing stable and reliable NIR calibrations for alcohol strength
and titratable acidity.