Table 5.
Phenolic compounds identification (µg/g oil) in black cumin and basil seed oils after extraction by hexane and MeTHF.
| RT (min) | Black Cumin | Basil | |||
|---|---|---|---|---|---|
| Hexane | MeTHF | Hexane | MeTHF | ||
| Gallic acid | 8.2 | nd | 4.9 ± 0.3 | nd | 7.3 ± 0.1 |
| Chlorogenic acid | 15.7 | nd | 3.9 ± 0.1 | nd | 7.2 ± 1.2 |
| Caffeic acid | 17.2 | nd | nd | 0.7 ± 0.1 B | 1.6 ± 0.1 A |
| Syringic acid | 17.8 | nd | 0.9 ± 0.1 | nd | 0.8 ± 0.1 |
| Sinapic acid | 19.6 | 16.3 ± 0.5 | nd | nd | nd |
| Ferulic acid | 20.2 | nd | nd | nd | 1.4 ± 0.1 |
| trans-hydroxycinnamic acid | 20.9 | 5.0 ± 0.1 b | 28.6 ± 1.1 a | nd | nd |
| Rosmarinic acid | 21.1 | nd | nd | 0.2 ± 0.1 B | 21.1 ± 0.2 A |
| Ellagic acid | 22.8 | nd | nd | 3.5 ± 1.5 B | 6.3 ± 0.1 A |
| Luteolin | 23.7 | nd | nd | 9.4 ± 0.1 A | 9.4 ± 0.1 A |
| Quercetin | 24.2 | 5.7 ± 0.3 b | 6.7 ± 0.4 a | nd | nd |
| Thymoquinone | 24.8 | 0.1 ± 0.0 b | 0.35 ± 0.1 a | nd | nd |
| Circimaritin | 25.1 | nd | nd | 1.0 ± 0.1 B | 5.8 ± 0.2 A |
| Isorhamnetin | 25.6 | 6.6 ± 0.1 a | 6.3 ± 0.2 a | nd | nd |
| Thymol | 26.1 | nd | nd | 33.1 ± 0.3 B | 127.6 ± 0.8 A |
nd: not detected. means ± SD, n = 3. The means with small letters (a–b) indicates significant differences (p < 0.05) between solvents in black cumin and capital letters (A–B) indicates significant differences (p < 0.05) between solvents in basil.