Determination of 2-Propenal Using Headspace Solid-Phase Microextraction Coupled to Gas Chromatography–Time-of-Flight Mass Spectrometry as a Marker for Authentication of Unrefined Sesame Oil

Table 3

The significance probability ( value and -value) of regression coefficients and lack of fit in the final reduced models.

Samples		Linear effects			Quadratic effects			Interaction effects			Blocks	Regression	Lack of fit
		Corn oil		0.486	0.828	0.676	0.836	0.551	0.972	0.043				0.285	0.650	0.953	0.000	0.381
-value	0.50		0.05	0.18	0.04	0.37	0.00	4.65	1.20	0.21	0.00	10.29	2.03
Soybean oil		0.000	0.080	0.000	0.001	0.002	0.188	0.080	0.000	0.403	0.069	0.000	0.713
	-value	772.33	3.36	412.40	16.18	12.77	1.84	3.35	30.39	0.73	3.64	125.17	0.74

level was determined at < 0.05.