Table 3.

GC-MS identification of chemical composition for Nigella sativa oil extracted by supercritical fluid and cold press.

	Compound name	Supercritical fluid			Cold press
		MW	RT	Peak area (%)	MW	RT	Peak area (%)
1	α-Pinene	—	—	—	136	3.19	7.10
2	3-Carene	136	3.29	2.60	136	3.29	2.21
3	Bicyclo[2.2.1]heptane	136	4.00	2.05	136	4.00	3.67
4	1,3,8-p-Menthatriene	—	—	—	134	4.96	23.82
5	ç-Terpinene	—	—	—	136	5.64	2.82
6	1,4-Cyclohexadiene	134	5.01	7.17	—	—	—
7	cis-4-Methoxy thujane	168	6.45	3.09	168	7.05	7.30
8	Cyclohexen	154	8.90	3.82	—	—	—
9	Limonene	—	—	—	236	8.41	0.41
10	Thymoquinone	164	11.32	16.80	164	11.06	16.21
11	Carvacrol	150	13.51	1.82	150	13.46	3.90
12	Longifolene	204	13.70	3.50	204	15.37	4.49
13	Ylangene	204	14.50	2.99	204	13.67	0.82
14	3-Allyl-6-methoxyphenol	164	14.61	0.40	—	—	—
15	1-Heptatriacotanol	—	—	—	536	20.91	0.14
16	2,3-Dihydrofarnesyl acetate	—	—	—	266	30.91	1.54
17	Caryophyllene	204	16.03	17.45	—	—	—
18	Naphthalene	204	17.88	2.94	—	—	—
19	α-Bisabolene	204	18.50	0.50	—	—	—
20	(−)-Spathulenol	220	22.37	0.79	—	—	—
21	Methyl tetradecanoate	242	24.54	0.54	—	—	—
22	Hexadecanoic acid	254	29.69	4.99	254	31.65	0.77
23	Ascorbic acid	652	31.75	1.12	652	34.95	2.15
24	9,12-Octadecadienoic acid (Z,Z)	294	33.70	14.05	294	35.45	7.85
25	4,8-Decadienal, 5,9-dimethyl	—	—	—	180	33.84	8.12
26	Methyl stearate	298	34.34	0.61
27	Butyl 9,12-octadecadienoate	336	35.11	2.29	336	11.77	0.21
28	Cyclopropanebutanoic acid	—	—	—	374	37.66	0.25
	Total			89.54			93.53

MW: molecular weight.

RT: retention time.