Table 3.
Effect of CM15 on the formation of volatile esters and alcohols in rice-flavor liquor.
| Compound identified | Retention index | Relative percentage (%) |
|
|---|---|---|---|
| Koji F | Koji F+CM15 | ||
| Esters | |||
| Ethyl acetate | - | 3.06 ± 0.42 | 5.68 ± 0.00 |
| Ethyl caproate | 1216 | 0.30 ± 0.01 | - |
| Pentyl acetate | - | - | 12.05 ± 0.85 |
| Methyl benzoylformate | - | 9.15 ± 0.00 | 6.83 ± 0.75 |
| Ethyl caprylate | 1439 | 0.92 ± 0.01 | 2.16 ± 1.53 |
| Ethyl caprate | 1647 | 3.75 ± 0.57 | 6.54 ± 0.44 |
| Ethyl laurate | 1850 | 0.68 ± 0.01 | - |
| Ethyl myristate | 2035 | 1.53 ± 0.08 | 0.96 ± 0.14 |
| Pentadecanoic acid, ethyl ester | 2041 | 0.02 ± 0.00 | - |
| Ethyl palmitate | 2246 | 7.78 ± 0.42 | 2.43 ± 0.40 |
| 9-Hexadecenoic acid, ethyl ester | 2260 | 0.07 ± 0.01 | - |
| Octadecanoic acid, ethyl ester | 2400 | 0.21 ± 0.03 | - |
| Ethyl oleate | 2479 | 0.76 ± 0.07 | - |
| 9,12-Octadecadienoic acid (Z, Z)-, ethyl ester | 2501 | 0.34 ± 0.01 | - |
| Percentage of esters | 28.56 ± 0.53 | 36.65 ± 3.81 | |
| Alcohols | |||
| 2-Methyl-1-propanol | 1113 | 4.20 ± 0.21 | 3.22 ± 0.25 |
| 2-Methyl-1-butanol | 1220 | 23.26 ± 1.91 | 20.90 ± 0.00 |
| 3-Buten-1-ol | - | 0.15 ± 0.01 | 0.11 ± 0.03 |
| 3-Methyl-2-buten-1-ol | - | 0.04 ± 0.00 | - |
| Phenylethyl alcohol | 1924 | 7.29 ± 1.50 | 4.17 ± 1.12 |
| Percentage of alcohol | 34.94 ± 3.64 | 28.39 ± 1.40 | |
Note: bold letters indicated the classification of main components and its proportion.