Table 2.
Chemical composition of the EOs.
| E. alba | E. eugenioides | E. fasciculosa | E. robusta | E. stoatei | Ki a | Ki b | Identification c | |
|---|---|---|---|---|---|---|---|---|
| α-Pinene | 54.1 | - | 0.1 | - | 13.6 | 857 | 1036 | 1,2,3 |
| Camphene | 3.9 | - | - | - | - | 869 | 1075 | 1,2,3 |
| Thuja-2,4(10)-diene | - | - | - | - | 0.2 | 875 | 1115 | 1,2 |
| β-Pinene | 0.4 | - | - | - | 0.1 | 894 | 1136 | 1,2,3 |
| α-Phellandrene | - | - | 1.5 | - | - | 922 | 1177 | 1,2,3 |
| α-Terpinene | - | - | 0.6 | - | - | 933 | 1170 | 1,2,3 |
| Eucalyptol (1,8-cineole) | 25.6 | 95.9 | 72.8 | 64.4 | 71.1 | 943 | 1210 | 1,2,3 |
| cis-Sabinene hydrate | - | - | - | 0.7 | - | 955 | 1070 | 1,2 |
| 1,3,8-p-Menthatriene | - | 1.6 | - | - | - | 958 | - | 1,2 |
| exo-Fenchol | 0.3 | - | - | - | - | 1019 | 1591 | 1,2 |
| Borneol | 3.4 | - | - | - | - | 1067 | 1615 | 1,2,3 |
| β-Panasinsene | - | - | 0.1 | - | 0.1 | 1275 | - | 1,2 |
| α-Gurjunene | - | - | 0.3 | - | - | 1288 | 1535 | 1,2 |
| (Z)-Caryophyllene | - | - | 1.0 | - | - | 1296 | 1617 | 1,2 |
| β-Cedrene | - | - | 0.1 | 0.1 | - | 1298 | 1625 | 1,2 |
| β-Copaene | - | - | 0.1 | 2.7 | - | 1304 | 1628 | 1,2 |
| Aromadendrene | 0.8 | - | 3.7 | - | 4.7 | 1308 | 1631 | 1,2 |
| β-Longipinene | - | - | - | 0.7 | - | 1323 | - | 1,2 |
| allo-Aromadendrene | 0.8 | - | 2.8 | - | 0.9 | 1330 | 1660 | 1,2 |
| Dehydro-Aromadendrene | - | - | 2.7 | - | - | 1331 | 1642 | 1,2 |
| γ-Gurjunene | 1.7 | - | - | - | - | 1343 | 1687 | 1,2 |
| δ-Selinene | - | - | - | - | 0.2 | 1350 | 1707 | 1,2 |
| γ-Amorphene | - | - | 0.6 | - | - | 1358 | 1695 | 1,2 |
| cis-β-Guaiene | 4.1 | - | - | - | - | 1361 | 1748 | 1,2 |
| trans-β-Guaiene | - | - | - | - | 0.6 | 1366 | 1723 | 1,2 |
| Viridiflorene | - | - | 6.1 | - | 2.9 | 1367 | 1713 | 1,2 |
| α-Muurolene | - | - | - | 6.4 | - | 1373 | 1744 | 1,2 |
| γ-Cadinene | - | - | - | 3.9 | - | 1385 | 1752 | 1,2 |
| δ-Cadinene | - | - | - | 15.7 | - | 1396 | 1755 | 1,2 |
| Germacrene B | - | - | 0.2 | - | - | 1433 | 1795 | 1,2 |
| Spathulenol | 1.2 | - | 1.1 | - | - | 1452 | 2127 | 1,2 |
| Total | 96.3 | 97.5 | 93.8 | 94.6 | 94.4 | |||
| Monoterpene hydrocarbons | 58.4 | 1.6 | 2.2 | - | 13.9 | |||
| Oxygenated monoterpenes | 29.3 | 95.9 | 72.8 | 65.1 | 71.1 | |||
| Total monoterpenes | 87.7 | 97.5 | 75.0 | 65.1 | 85.0 | |||
| Sesquiterpene hydrocarbons | 7.4 | - | 17.7 | 29.5 | 9.4 | |||
| Oxygenated sesquiterpenes | 1.2 | - | 1.1 | - | - | |||
| Total sesquiterpenes | 8.6 | - | 18.8 | 29.5 | 9.4 | |||
| Ratio of monoterpenes/sesquiterpenes | 10.2 | - | 4.0 | 2.2 | 9.0 |
a,b The Kovats retention indices are relative to a series of n-alkanes (C10–C35) in the apolar HP-5 MS and the polar HP Innowax capillary columns, respectively. c Identification method: 1 = comparison of the Kovats retention indices with published data, 2 = comparison of mass spectra with those listed in the NIST 02 and Wiley 275 libraries and with published data, and 3 = coinjection with authentic compounds; t = trace (<0.1%). - = absent.