Authentication of Nigella sativa Seed Oil in Binary and Ternary Mixtures with Corn Oil and Soybean Oil Using FTIR Spectroscopy Coupled with Partial Least Square

Table 2

The composition of fatty acids in NSO, CO, and SO.

Fatty acids	Concentration (%)
	NSO	CO	CO (Codex)	SO	SO (Codex)
Caproic acid (C6:0)	0.18	ND	ND	0.01	ND
Caprylic acid (C8:0)	0.04	0.00	ND	0.01	ND
Capric acid (C10:0)	0.06	0.00	ND	0.04	ND
Lauric acid (C12:0)	0.07	0.14	ND–0.30	0.02	ND–0.10
Myristic acid (C14:0)	0.02	0.00	ND–0.30	0.06	ND–0.20
Myristoleic acid (C14:1)	0.01	ND	ND	ND	ND
Palmitic acid (C16:0)	19.42	0.08	8.60–16.50	11.29	8–13.50
Palmitoleic acid (C16:1)	0.29	0.001	ND–0.50	0.11	ND–0.20
Oleic acid (C18:1)	45.22	15.32	ND–3.30	0.02	17–30
Linoleic acid (C18:2)	30.18	64.19	34.00–65.60	87.05	48.00–59.00
Linolenic acid (C18:3)	2.07	16.76	ND–2.00	0.64	4.50–11.00
Behenic acid (C22:0)	0.23	ND	ND–0.50	ND	ND–0.70
Eicosatrienoic acid (C20:3)	1.62	0.43	ND	ND	ND
Arachidonic acid (C20:4)	0.59	ND	ND	ND	ND

ND: not detected; the level is below 0.001%.