Table 1.
Chemical composition of the Lippia alba essential oils obtained by microwave-assisted hydrodistillation of each specimen or chemotype.
| No. | Compounds | IK | Relative amount (%)
|
|
|---|---|---|---|---|
| COL512077 (citral) | COL512078 (carvone/limonene) | |||
| 1 | α-pinene | 937 | 0.1 | 0.1 |
| 2 | Camphene | 954 | - | 0.4 |
| 3 | Verbenene | 967 | - | 0.2 |
| 4 | 1-octen-3-ol | 981 | 0.3 | - |
| 5 | β-pinene-1-octen-3-ol | 982 | - | 0.1 |
| 6 | 6-methyl-5-hepten-2-one | 986 | 2.2 | - |
| 7 | β-Myrcene | 990 | 0.2 | 1.0 |
| 8 | α-phellandrene | 1010 | 0.2 | - |
| 9 | ρ-cymene | 1028 | 0.2 | - |
| 10 | Limonene | 1035 | 2.5 | 33.2 |
| 11 | trans-β-ocimene | 1048 | 0.4 | 1.0 |
| 12 | Linalool | 1101 | 1.8 | 0.7 |
| 13 | trans-p-mentha-2,8-diene-1-ol | 1127 | - | 0.3 |
| 14 | cis-limonene oxide | 1138 | - | 0.1 |
| 15 | Hexenyl cis-3-isobutanoate | 1140 | 0.1 | - |
| 16 | cis-p-mentha-2,8-diene-1-ol | 1141 | - | 0.2 |
| 17 | Citronellal | 1153 | 1.0 | - |
| 18 | Rosefuran epoxide | 1171 | 0.1 | - |
| 19 | Borneol | 1180 | - | 0.6 |
| 20 | cis-dihydrocarvone | 1203 | - | 0.3 |
| 21 | trans-dihydrocarvone | 1210 | - | 0.2 |
| 22 | trans-carveol | 1227 | - | 0.3 |
| 23 | Nerol | 1228 | 2.0 | - |
| 24 | Neral | 1246 | 25.4 | - |
| 25 | Geraniol | 1254 | 7.1 | - |
| 26 | Carvone | 1257 | - | 38.1 |
| 27 | Piperitone | 1263 | - | 4.4 |
| 28 | Geranial | 1276 | 33.1 | - |
| 29 | Piperitenone | 1349 | - | 4.3 |
| 30 | Neryl acetate | 1357 | 0.2 | - |
| 31 | Geranyl acetate | 1376 | 2.7 | - |
| 32 | β-copaene | 1384 | - | 0.1 |
| 33 | β-bourbonene + β-Elemene | 1394 | - | 2.2 |
| 34 | β-elemene | 1397 | 1.9 | 1.2 |
| 35 | β-ylangene | 1429 | - | 0.3 |
| 36 | trans-β-caryophyllene | 1432 | 6.6 | 0.2 |
| 37 | β-gurjunene | 1441 | - | 0.3 |
| 38 | α-guaiene | 1444 | 1.2 | - |
| 39 | trans-β-farnesene | 1456 | 0.2 | 0.8 |
| 40 | α-humulene | 1469 | 1.3 | - |
| 41 | Caryophyllene-9-epi-E | 1473 | 0.1 | 0.3 |
| 42 | Bicyclosesquiphellandrene | 1493 | 1.2 | 7.7 |
| 43 | Bicyclogermacrene | 1507 | - | 0.5 |
| 44 | α-bulnesene | 1511 | 0.6 | - |
| 45 | cis-α-bisabolene | 1547 | 0.6 | - |
| 46 | Caryophyllene oxide | 1599 | 0.5 | - |
| Monoterpene hydrocarbons | 3.5 | 36.0 | ||
| Oxygen containing monoterpenes | 70.5 | 49.4 | ||
| Sesquiterpene hydrocarbons | 13.6 | 13.6 | ||
| Oxygen containing sesquiterpenes | 0.5 | 0.0 | ||
| Other not identified | 5.4 | 0.0 | ||
| Total | 93.5 | 99.1 | ||
No., Order of elution is given in DB-5MScolumn, IK, Values of retention index (Kovats, 1965) calculated from a minimum of three independent chromatograms.