Table 5.

Prediction performances with Savitzky-Golay filter between valid acidity and second derivate spectra using each smoothing point (polynomial order=2)

Model	Smoothing point	No. of factors	r2	RMSEC	RMSEP
1	3	6	0.625	0.0839	0.109
2	5	10	0.761	0.0670	0.0933
3	7	9	0.785	0.0634	0.0823
4	9	6	0.750	0.0634	0.0821
5	11	6	0.786	0.0634	0.0723
6	13	4	0.762	0.0667	0.0749
7	15	4	0.773	0.0653	0.0735
8	17	5	0.786	0.0634	0.0693
9	19	5	0.786	0.0634	0.0699
10	21	5	0.786	0.0633	0.0711

r ²: Correlation coefficient of determination