Fig. 5. Correlation statistics between chemical reference value and FT-NIRS prediction value in calibration and prediction sets. The FT-NIRS models were developed by PLS
regression with leave-one-out cross validation using selected spectral regions of 11,995.4 ~ 7498.1 cm1 pretreated by SLS, and 6101.9 ~ 5446.2 cm1 pretreated by SD for alcohol
strength (a) and titratable acidity (b), respectively.