Table 2.
Chemical composition of M. longifolia essential oil.
| Componentsb | RIc | Molecular mass | % Compositiona | Mode of identificationd | Quality (%)e |
|---|---|---|---|---|---|
| Monoterpene hydrocarbons | (7.31) | ||||
| α-Pinene | 939 | 136 | 0.76 ± 0.06 | RT, RI, MS | 97 |
| β-Pinene | 979 | 136 | 2.14 ± 0.19 | RT, RI, MS | 96 |
| Limonene | 1029 | 136 | 1.80 ± 0.19 | RT, RI, MS | 94 |
| cis-β-Ocimene | 1037 | 136 | 1.98 ± 0.11 | RT, RI, MS | 97 |
| δ-Terpinene | 1089 | 136 | 0.63 ± 0.04 | RI, MS | 96 |
| Oxygenated monoterpenes | (67.24) | ||||
| 1,8-Cineol | 1031 | 154 | 2.00 ± 0.17 | RT, RI, MS | 98 |
| Linalool | 1097 | 154 | 0.98 ± 0.10 | RT, RI, MS | 98 |
| Borneol | 1169 | 154 | 5.96 ± 0.44 | RT, RI, MS | 96 |
| α-Terpineol | 1189 | 154 | 1.17 ± 0.09 | RT, RI, MS | 98 |
| Thymol | 1290 | 150 | 2.85 ± 0.20 | RT, RI, MS | 99 |
| Piperitenone | 1343 | 150 | 24.9 ± 1.34 | RT, RI, MS | 97 |
| Thymol acetate | 1352 | 192 | 1.08 ± 0.08 | RI, MS | 94 |
| Piperitenone oxide | 1370 | 166 | 28.3 ± 1.6 | RT, RI, MS | 96 |
| Sesquiterpene hydrocarbons | (17.19) | ||||
| α-Gurjunene | 1410 | 204 | 1.11 ± 0.18 | RI, MS | 96 |
| β-Caryophyllene | 1421 | 204 | 5.94 ± 0.32 | RT, RI, MS | 99 |
| Germacrene D | 1485 | 204 | 8.16 ± 1.01 | RT, RI, MS | 99 |
| Calamenene | 1540 | 202 | 1.98 ± 0.17d | RT, RI, MS | 98 |
| Oxygenated sesquiterpenes | (5.05) | ||||
| cis-Jasmone | 1393 | 164 | 1.13 ± 0.11a | RT, RI, MS | 96 |
| Caryophyllene oxide | 1583 | 220 | 3.92 ± 0b | RT, RI, MS | 97 |
|
| |||||
| Total | 96.79 | ||||
aValues are mean ± standard deviation of three samples of M. longifolia essential oil, analyzed individually in triplicate.
bCompounds are listed in order of elution from a HP-5MS column; cretention indices relative to C9–C24 n-alkanes on the HP-5MS column; dmode of identifications; RT: identification based on retention time; RI: identification based on retention index; MS: identification based on comparison of MS data compared with those from the NIST02.L and WILEY7n.L mass spectral libraries; ematching percentage with the NIST02.L and WILEY7n.L mass spectral libraries.