Table 4.
Comparison of volatile compounds
| Compounds | KI | Identification methods | Inoculating fermentation 8 days | Natural fermentation 20 days |
|---|---|---|---|---|
| Aldehyde | ||||
| Nonanal | 1,104 | MS RI | 0.78 | 1.45 |
| (E)‐2‐Octenal | 1,156 | MS RI | – | 0.80 |
| Decanal | 1,206 | MS RI | 1.62 | 1.95 |
| α‐Citral | 1,272 | MS RI | 1.98 | 6.44 |
| Alcohol | ||||
| Ethanol | 427 | MS RI | 7.35 | 72.82 |
| 3‐Methyl‐1‐butanol | 786 | MS RI | 8.19 | 64.45 |
| 1‐Pentanol | 831 | MSRI | – | 1.63 |
| (E)‐2‐Hexen‐1‐ol | 862 | MS RI | 20.58 | 21.23 |
| 2‐Heptanol | 901 | MS RI | 0.56 | 1.22 |
| n‐Hexanol | 934 | MSRI | 14.25 | 50.11 |
| 6‐methyl‐5‐hepten‐2‐ol | 1,016 | MSRI | – | 1.89 |
| 2‐Ethyl‐1‐hexanol | 1,051 | MSRI | – | 3.32 |
| Eucalyptol | 1,029 | MS RI | 23.30 | – |
| Linalool | 1,100 | MS RI | 2.08 | 1.39 |
| 1‐Octanol | 1,112 | MSRI | 5.21 | 6.98 |
| bicyclo[2.2.1]heptan‐3‐ol | 1,148 | MS RI | 0.68 | 1.71 |
| L(‐)‐Borneol | 1,165 | MS RI | 10.72 | 14.22 |
| (‐)‐Terpinen‐4‐ol | 1,177 | MS RI | 1.35 | 3.88 |
| alpha‐Terpineol | 1,190 | MS RI | 6.90 | 12.23 |
| 2,6‐Octadien‐1‐ol,3,7‐dimethyl‐, (2Z)‐ | 1,229 | MS RI | 4.49 | 37.23 |
| Geraniol | 1,255 | MS RI | 12.77 | 51.67 |
| 1‐Phenyl‐2‐ethanol | 1,369 | MS RI | 2.90 | 5.67 |
| Nerolidol | 1,564 | MS RI | 1.41 | 3.13 |
| Ketones | ||||
| 5‐Hepten‐2‐one, 6‐methyl‐ | 1,144 | MS RI | 0.80 | 1.95 |
| 2‐Undecanone | 1,294 | MS RI | 0.59 | 3.65 |
| Geranyl acetone | 1,452 | MS RI | 1.25 | 1.86 |
| β‐Ionone | 1,672 | MS RI | ‐ | 0.58 |
| Acid | ||||
| Acetic acid | 610 | MS RI | 97.67 | 16.24 |
| Hexanoic acid | 1,596 | MS RI | 2.89 | 6.37 |
| Octanoic acid | 1,807 | MS RI | 1.37 | 3.74 |
| Ester | ||||
| Ethyl acetate | 668 | MS RI | 136.94 | 299.71 |
| Ethyl caprylate | 1,198 | MS RI | 8.55 | 23.49 |
| Bornyl acetate | 1,286 | MS RI | 0.52 | 1.95 |
| Geranyl acetate | 1,383 | MS RI | 4.64 | 5.74 |
| Ethyl caprate | 1,416 | MS RI | 5.23 | 22.61 |
| Ethyl dodecanoate | 1,612 | MS RI | 4.97 | 9.72 |
| Ethyl tetradecanoate | 1,816 | MS RI | 1.41 | 3.71 |
| Ethyl hexadecanoate | 2,022 | MS RI | 6.21 | 15.38 |
| Alkene | ||||
| β‐Myrcene | 992 | MS RI | 4.10 | 13.12 |
| Terpinolene | 1,088 | MS RI | 0.40 | 2.36 |
| β‐Elemene | 1,393 | MS RI | 0.54 | 2.81 |
| γ‐Curcumene | 1,480 | MS RI | 2.46 | 25.59 |
| Others | ||||
| Eugenol | 1,919 | MS RI | 1.05 | 1.08 |
| 4‐Ethenyl‐2‐methoxy‐Phenol | 1,948 | MS RI | 6.77 | 8.46 |
| 2,4‐Di‐tert‐butylphenol | 2,070 | MS RI | 0.91 | 0.60 |
| 2,3‐Dihydrobenzofuran | 2,151 | MS RI | 1.22 | 2.28 |