Table 4.
Volatile compounds in the untreated (0 % DH) and pectinase treated (21 % DH) longan pulp hydrolysate
| Peak | Compound name | (%)area | ||
|---|---|---|---|---|
| 0 % DH | 21 % DH | RIs | ||
| 1 | Acetaldehyde | 4.39 | 6.78 | 714 |
| 2 | Ethyl acetate | ND | 2.42 | 807 |
| 3 | Ethanol | 20.16 | 28.50 | 857 |
| 4 | Butanoic acid ethyl ester | 0.73 | ND | 1,022 |
| 5 | 2-butenal | ND | 0.27 | 1,040 |
| 6 | (E)-2-butenal | 0.31 | ND | 1,041 |
| 7 | DL-limonene | ND | 0.50 | 1,194 |
| 8 | α-ocimene | 1.92 | 1.25 | 1,245 |
| 9 | β-ocimene | 60.34 | 49.72 | 1,270 |
| 10 | 3-hydroxy-2-butanone | ND | 0.47 | 1,295 |
| 11 | Alloocimene | 0.50 | ND | 1,378 |
| 12 | Ethyl octanoate | 0.87 | ND | 1,427 |
| 13 | (E)-2,6-dimethyl-1,3,5,7-octatetraene | 2.31 | 2.00 | 1,460 |
| 14 | Ethyl sorbate | 0.17 | ND | 1,478 |
| 15 | 2-ethyl-1-hexanol | ND | 0.53 | 1,492 |
| 16 | Ethyl 3-hydroxybutyrate | 0.85 | 1.25 | 1,524 |
| 17 | Linalool | 0.73 | 0.92 | 1,554 |
| 18 | Ethyl E-2-octenoate | 0.31 | ND | 1,585 |
| 19 | Nonylcyclopropane | 0.17 | ND | 1,621 |
| 20 | Ethyl benzoate | 1.83 | 0.82 | 1,675 |
| 21 | alpha-caryophyllene | 0.18 | ND | 1,680 |
| 22 | 2,6-octadienoic acid, 3,7-dimethyl-, methyl ester | 0.34 | ND | 1,698 |
| 23 | 2,6-dimethyl-6-(4-methyl-3-pentenyl)bicyclo[3.1.1]hept-2-ene | 0.21 | 0.26 | 1,712 |
| 24 | E,E-alpha-farnesene | 0.55 | 0.72 | 1,725 |
| 25 | Methyl salicylate | 0.25 | ND | 1.782 |
| 26 | Dodecanoic acid, ethyl ester | 0.71 | 0.85 | 1,822 |
| 27 | Carbamodithioic acid, diethyl-, methyl ester | 0.18 | 0.40 | 1,956 |
| 28 | Ethyl tetradecanoate | 0.36 | 0.46 | 2,029 |
| 29 | Methyl 2-methoxybenzoate | ND | 0.33 | 2,114 |
| 30 | Eugenol | ND | 0.63 | 2,215 |
| 31 | Hexadecanoic acid, ethyl ester | 0.19 | 0.21 | 2,229 |
| 32 | Phenol, 2,4-bis(l,l-dimethylethyl)- | 1.45 | ND | 2,243 |
| 33 | Benzophenone | ND | 0.70 | 2,545 |
ND not detected
RIs retention indices