Quantification and Classification of Corn and Sunflower Oils as Adulterants in Olive Oil Using Chemometrics and FTIR Spectra

Table 2

The performance of multivariate calibration (MC) and spectral treatments for analysis of sunflower oil in EVOO.

			Equation		𝑅^2		RM	RM
MC	Spectra	Factor	Calibration	Prediction	Calibration	Prediction	SEC	SEP
							(% v/v)	(% v/v)
PLS	Normal	(8)	𝑦=1.000𝑥−0.001	𝑦=1.097𝑥−0.378	1.000	0.997	0.005	2.34
	1st der	(8)	𝑦=1.000𝑥−0.002	𝑦=1.015𝑥+0.139	1.000	0.987	0.034	2.02
	2nd der	(7)	𝑦=0.999𝑥+0.017	𝑦=0.512𝑥+9.505	0.999	0.580	0.425	10.3
PCR	Normal	(9)	𝑦=0.999𝑥+0.020	𝑦=1.125𝑥−0.447	0.999	0.975	0.426	4.07
	1st der	(9)	𝑦=0.997𝑥+0.067	𝑦=0.958𝑥+1.085	0.997	0.985	0.829	1.98
	2nd der	(9)	𝑦=0.901𝑥+1.976	𝑦=0.083𝑥+11.612	0.901	0.052	4.44	17.2