Table 1. Compounds identified in tea tree (Melaleuca alternifolia), lavender (Lavandula angustifolia), bergamot (Citrus bergamia) and peppermint (Mentha piperita) essential oils.
| Compound | RI | w/% | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Tea tree | Lavender | Bergamot | Peppermint | |||||||
| α-thujene | 924.9 | 0.86 | 0.16 | – | 0.83 | |||||
| α-pinene | 930.3 | 2.57 | – | 0.15 | 1.15 | |||||
| camphene | 944.5 | – | 0.13 | – | – | |||||
| β-pinene | 972.9 | 0.70 | – | 0.78 | – | |||||
| sabinene | 973.2 | – | 0.14 | – | 0.51 | |||||
| myrcene | 992.5 | 0.75 | 0.19 | 0.37 | – | |||||
| α-phellandrene | 1003.7 | 0.33 | 0.26 | – | – | |||||
| n.i. | 1011.1 | – | – | – | 0.17 | |||||
| α-terpinene | 1015.5 | 7.84 | 0.75 | – | – | |||||
| p-cymene | 1024.4 | 5.15 | 0.21 | 1.03 | 0.19 | |||||
| β-phellandrene | 1027.4 | 1.54 | – | – | – | |||||
| limonene | 1028.4 | – | – | 6.67 | – | |||||
| 1,8-cineole | 1028.6 | 3.15 | 1.88 | – | 1.71 | |||||
| sylvestrene | 1029.0 | – | 0.67 | – | – | |||||
| γ-terpinene | 1058.1 | 19.47 | 0.15 | 1.39 | 0.13 | |||||
|
Artemisia ketone |
1063.8 | – | 0.21 | – | 0.34 | |||||
| cis-sabinene hydrate | 1070.2 | – | 0.10 | – | 0.87 | |||||
| trans-sabinene hydrate | 1102.0 | – | – | – | 0.11 | |||||
| cis-linalool oxide | 1073.2 | – | 0.65 | 0.26 | – | |||||
| terpinolene | 1087.7 | 3.21 | – | – | – | |||||
| trans-linalool oxide | 1089.8 | – | 0.61 | 0.23 | – | |||||
| linalool | 1105.0 | – | 35.68 | 22.93 | 0.38 | |||||
| 1-octen-3-yl acetate | 1116.5 | – | 0.66 | – | – | |||||
| n.i. | 1121.3 | – | – | – | 0.08 | |||||
| camphor | 1141.8 | – | 0.64 | – | – | |||||
| menthofuran | 1162.8 | – | – | – | 7.16 | |||||
| menthol | 1166.8 | – | – | – | 3.39 | |||||
| borneol | 1167.4 | – | 1.75 | – | – | |||||
| isomenthol | 1176.6 | – | – | – | 49.30 | |||||
| terpinen-4-ol | 1178.5 | 44.72 | 3.94 | 0.49 | – | |||||
| neoisomenthol | 1184.6 | – | – | – | 0.99 | |||||
| α-terpineol | 1194.6 | 3.11 | 0.44 | 0.33 | – | |||||
| hexyl isovalerate | 1245.1 | – | 0.32 | – | – | |||||
| pulegone | 1240.9 | – | – | – | 1.57 | |||||
| ascaridole | 1241.0 | – | – | 0.24 | – | |||||
| linalool acetate | 1258.6 | 0.24 | 42.25 | 57.51 | – | |||||
| n.i. | 1258.7 | – | – | 0.33 | – | |||||
| piperitone | 1259.6 | – | – | – | 0.29 | |||||
| n.i. | 1264.6 | – | – | 0.41 | – | |||||
| neomenthyl acetate | 1276.8 | – | – | – | 0.23 | |||||
| lavandulyl acetate | 1294.8 | – | 1.72 | – | – | |||||
| menthyl acetate | 1295.4 | – | – | – | 5.63 | |||||
| isomenthyl acetate | 1309.4 | – | – | – | 0.17 | |||||
| hexyl tiglate | 1337.9 | – | 0.17 | – | – | |||||
| n.i. | 1348.2 | – | 0.20 | – | – | |||||
| n.i. | 1356.4 | – | 0.28 | – | – | |||||
| n.i. | 1362.2 | – | 0.34 | – | – | |||||
| terpinyl acetate | 1351.6 | – | – | 0.71 | – | |||||
| neryl acetate | 1369.3 | – | 0.52 | 1.87 | – | |||||
| Compound | RI | w/% | ||||||||
| Tea tree | Lavender | Bergamot | Peppermint | |||||||
| β-bourbonene | 1381.6 | – | – | – | 0.29 | |||||
| geranyl acetate | 1388.6 | – | 0.85 | 0.72 | – | |||||
| n.i. | 1405.2 | – | – | 0.62 | – | |||||
| sesquithujene | 1405.7 | – | 0.12 | – | – | |||||
| α-gurjunene | 1406.3 | 0.32 | – | – | – | |||||
| trans- caryophyllene | 1416.4 | 0.35 | 0.91 | 0.47 | 1.79 | |||||
| α-trans- bergamotene | 1434.6 | – | – | 0.39 | – | |||||
| aromadendrene | 1435.5 | 1.25 | – | – | – | |||||
| α-humulene | 1451.3 | 0.50 | 0.13 | – | – | |||||
| alloaromaden- -drene |
1458.2 | 0.30 | – | – | – | |||||
| trans-β- farnesene | 1459.1 | – | 0.04 | – | – | |||||
|
trans-cadina- -1(6),4-diene |
1472.4 | 1.31 | – | – | – | |||||
|
cis-muurola- -4(14),5-diene |
1479.8 | – | 0.11 | – | – | |||||
| germacrene D | 1479.8 | – | – | – | 1.00 | |||||
| valencene | 1493.2 | 1.51 | – | – | – | |||||
| β-bisabolene | 1510.7 | – | – | 2.08 | – | |||||
| lavandulyl isovalerate | 1512.6 | – | 0.42 | – | – | |||||
| γ-cadinene | 1513.2 | – | 0.21 | – | – | |||||
| d-cadinene | 1523.1 | 0.44 | – | – | – | |||||
|
trans-cadina- -1,4-diene |
1531.9 | 0.39 | – | – | – | |||||
| caryophyllene oxide | 1580.9 | – | 1.31 | – | – | |||||
| Sum of identified | 100.00 | 98.30 | 98.64 | 99.72 | ||||||
RI=retention index relative to n-alkanes on HP-5 capillary column, n.i.=not identified