Concomitant Use of Fourier Transform Infrared Attenuated Total Reflectance Spectroscopy and Chemometrics for Quantification of Multiple Adulterants in Roasted and Ground Coffee

Table 5

Comparison of the performances of models based on DRIFTS and FTIR-ATR.

Optimized models	DRIFTS [10]	FTIR-ATR
Number of calibration samples	88	79
Number of validation samples	44	54
LV	10	8
RMSEC (%)	1.61	0.69
RMSEP (%)	2.34	2.00
	0.99	0.99
	0.98	0.99

LV: latent variables; : calibration correlation coefficient; : validation correlation coefficient.