Table 1.
Comparison of chemical composition (%) of CEO reported by different authors.
| Golmakani, M.T., et al. 2017 [19] | Kennouche, A., et al. 2015 [21] | González-Rivera, J., et al. 2016 [22] | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Compound | Retention Index |
Relative Peak Area (%) |
Retention Index |
Relative Peak Area (%) |
Retention Index |
Relative Peak Area (%) |
|||||
| HD | SD | MA HD | MA SD | MA SD outside |
MA SD inside |
Coaxial MA HD |
|||||
| 1 | Eugenol | 1359 | 87.3 | 82.7 | 88.8 | 83.4 | 1360 | 65.36 | 71.84 | 1367 | 66.9 |
| 2 | Eugenyl acetate | 1526 | 10.4 | 15.6 | 7.46 | 14.3 | 1519 | 5.71 | 9.49 | 1529 | 2.7 |
| 3 | β-Caryophyllene | 1415 | 1.35 | 0.91 | 2.65 | 1.37 | 1446 | 24.62 | 15.6 | 1422 | 24.8 |
| 4 | α-Humulene | 1449 | 0.19 | 0.13 | 0.4 | 0.21 | 1455 | - | 0.01 | 1454 | 3.1 |
| 5 | Caryophyllene oxide | 1578 | 0.2 | 0.17 | 0.19 | 0.22 | - | - | - | 1367 | 0.1 |
| 6 | α-Copaene | - | - | - | - | - | 1377 | 0.01 | tr | 1378 | 0.8 |
| 7 | Chavicol | 1251 | 0.31 | 0.24 | 0.22 | 0.22 | 1253 | 0.13 | 0.1 | - | - |
| 8 | Methyl salycilate | 1191 | 0.08 | 0.08 | 0.1 | 0.07 | 1188 | 0.1 | 0.08 | - | - |
| 9 | Benzaldehyde | 956 | 0.07 | 0.08 | 0.06 | 0.05 | - | - | - | - | - |
| 10 | Benzyl acetate | 1161 | 0.05 | 0.04 | 0.06 | 0.05 | 1161 | 0.02 | 0.02 | - | - |
| 11 | 2-Nonanone | 1089 | 0.04 | 0.04 | 0.05 | 0.04 | - | - | - | - | - |
| 12 | Benzyl benzoate | 1759 | 0.02 | 0.03 | 0.01 | 0.02 | - | - | - | - | - |
| 13 | Ethyl benzoate | 1167 | 0.01 | 0.01 | 0.01 | 0.01 | 1181 | 0.02 | 0.02 | - | - |
| 14 | 1,8-Cineole | - | - | - | - | - | 1032 | 0.03 | 0.03 | - | - |
| 15 | 1,3,8-p-Menthatriene | - | - | - | - | - | 1110 | 0.03 | 0.01 | - | - |
| 16 | 2-Heptanone | - | - | - | - | - | 881 | 0.01 | tr | - | - |
| 17 | 2-Heptyl acetate | - | - | - | - | - | 1043 | 0.03 | 0.01 | - | - |
| 18 | 2-Nonanol | - | - | - | - | - | 1098 | 0.01 | tr | - | - |
| 19 | 6-Methyl coumarin | - | - | - | - | - | 1549 | 0.03 | tr | - | - |
| 20 | Acetophenone | - | - | - | - | - | 1078 | 0.03 | 0.01 | - | - |
| 21 | Caryophyllene alcohol | - | - | - | - | - | 1565 | 0.04 | tr | - | - |
| 22 | Epizonarene | - | - | - | - | - | 1492 | 0.07 | 0.05 | - | - |
| 23 | Germacrene D | - | - | - | - | - | 1484 | 0.14 | 0.09 | - | - |
| 24 | Methyl benzoate | - | - | - | - | - | 1087 | 0.01 | tr | - | - |
| 25 | Methyl eugenol | - | - | - | - | - | 1404 | 0.04 | tr | - | - |
| 26 | Methyl undecanoate | - | - | - | - | - | 1420 | 0.02 | tr | - | - |
| 27 | N-Citronellyl butyrate | - | - | - | - | - | 1532 | 0.01 | tr | - | - |
| 28 | Viridiflorol | - | - | - | - | - | 1591 | 0.02 | - | - | - |
| 29 | Z-Nerolidol | - | - | - | - | - | 1534 | 0.06 | 0.02 | - | - |
| 30 | α-Pinene | - | - | - | - | - | 934 | tr | 0.03 | - | - |
| 31 | β-Cubebene | - | - | - | - | - | 1382 | 0.02 | tr | - | - |
| 32 | β-Pinene | - | - | - | - | - | 997 | tr | tr | - | - |
| 33 | γ-Gurjunene | - | - | - | - | - | 1470 | 2.35 | 1.65 | - | - |
| 34 | δ-Cadinene | - | - | - | - | - | 1500 | 0.22 | 0.2 | 1523 | 0.6 |
| 35 | ρ-Acoradiene | - | - | - | - | - | 1461 | 0.03 | 0.01 | - | - |
| 36 | ρ-Cymene | - | - | - | - | - | 1020 | tr | 0.07 | - | - |
HD, hydrodistillation; SD, steam distillation; MA, microwave-assisted.