The Use of Fourier Transform Infrared Spectroscopy for Quantification of Adulteration in Virgin Walnut Oil

Table 2

PLS performance for analysis of soybean oil, puer tea seed oil, and sunflower oil as oil adulterants in VWO.

Adulterants	Principal components	𝑅^2		RMSEC (%v/v)	RMSEP (%v/v)
		Calibration	Prediction
Soybean oil	5	0.9958	0.9963	1.35	1.31
Puer tea seed oil	5	0.9925	0.9961	1.85	1.31
Sunflower oil	5	0.9952	0.9978	1.43	1.11