Table 1.

Percentage Yield of Supercritical Carbon Dioxide Extracts of Nigella sativa Seeds in Relation to the Extraction Time Interval

			Percentage yield (g/100 g) in the extraction time intervals
Extract code	Pressure (psi)	Temperature (°C)	15 min	30 min	45 min	60 min	Correlation R2 value
A1	2500	32	02.58±0.24	06.57±0.02	09.04±0.11	10.81±1.18	0.95
A2	2500	45	01.88±0.22	03.01±0.18	04.17±0.26	06.88±1.63	0.82
A3	2500	60	01.43±0.06	02.60±0.06	02.65±0.08	03.06±0.85	0.59
B1	3000	32	04.81±0.49	11.42±0.16	15.10±0.57	17.77±0.98	0.91
B2	3000	45	03.72±0.27	07.46±0.47	11.08±0.94	13.89±0.33	0.97
B3	3000	60	02.32±0.18	05.78±0.30	09.66±0.55	09.48±0.59	0.96
C1	4500	32	05.72±0.23	18.49±0.37	25.34±0.23	30.41±1.09	0.95
C2	4500	45	14.50±0.28	23.52±0.11	27.62±0.67	27.94±1.37	0.83
C3	4500	60	17.34±0.04	24.34±0.11	25.44±0.69	26.86±0.15	0.82
D1	6000	32	19.65±0.17	28.79±0.13	29.93±0.04	30.41±0.17	0.72
D2	6000	45	15.17±0.11	26.75±0.28	29.85±0.06	30.27±0.41	0.78
D3	6000	60	23.57±0.06	27.21±0.47	29.77±0.08	29.85±0.20	0.86

Results are represented as mean±SD (n=3), P<.05.

SC-CO₂, supercritical carbon dioxide.