Analysis of Flavonoid in Medicinal Plant Extract Using Infrared Spectroscopy and Chemometrics

Table 5

The calibration of FTIR model.

Wavelength number	R^2 calibration	R^2 validation	RMSEC	RMSECV
4000–500 cm^−1	0.8558883	0.5403671	9.2037029	16.860432
3500–3000 cm^−1	0.8527114	0.5758341	11.093782	18.985434
1300–1000 cm^−1	0.8234164	0.7321395	10.187981	12.915498
1650–1400 cm^−1	0.8653689	0.8201284	8.8958149	10.315225