| Functional groups | SDE | SPME | ||||
|---|---|---|---|---|---|---|
| No. | Area% | mg/kg | No. | Area% | mg/kg | |
| Alcohol | 27 | 26.81 | 336.18 | 7 | 8.23 | 40.23 |
| Aldehyde | 13 | 2.06 | 25.89 | 5 | 1.16 | 6.14 |
| Ester | 3 | 2.09 | 26.22 | 1 | 0.15 | 0.74 |
| Hydrocarbon | 22 | 31.12 | 390.30 | 18 | 30.76 | 150.34 |
| Ketone | 12 | 18.62 | 233.51 | 7 | 19.61 | 95.85 |
| Oxide | 1 | 18.67 | 234.16 | 1 | 39.99 | 195.44 |
| N-containing compound | 1 | 0.62 | 7.74 | - | - | |
| Total | 79 | 100.00 | 1,254.00 | 39 | 100 | 488.74 |