Table 4.
Changes of volatile components in Sichuan sauerkraut during storage (45 °C, 35 °C).
| Classification | Molecular Formula | Compounds | RT | Storage Temperature | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 45 °C | 35 °C | |||||||||
| 0 d | 28 d | 56 d | 84 d | 42 d | 70 d | 154 d | ||||
| Area % | Area % | Area % | Area % | Area % | Area % | Area % | ||||
| Sulfur compounds (2) | ||||||||||
| 1 | C4H10S2 | Ethane, 1,1-bis (methylthio) - | 9.12 | 8.97 | 6.76 | 1.79 | 0.07 | 9.85 | 8.23 | 1.9 |
| 2 | C2H6S3 | Dimethyl trisulfide | 10.36 | 4.62 | 4.85 | 8.63 | 8.59 | 5.94 | 6.8 | 4.02 |
| Ester compounds (8) | ||||||||||
| 1 | C5H10O3 | Propanoic acid, 2-hydroxy-, ethyl ester | 4.82 | 1.28 | 1.51 | 1 | 0.86 | 1.25 | 1.36 | 2.63 |
| 2 | C10H20O2 | Octanoic acid, ethyl ester | 21.24 | 0.39 | 1.04 | 0.24 | 0.26 | 1.23 | 1.43 | 0.75 |
| 3 | C17H34O2 | Hexadecanoic acid, methyl ester | 46.88 | 0.66 | 0.37 | 0.41 | 0.06 | 0.32 | 0.27 | 0.09 |
| 4 | C18H36O2 | Hexadecanoic acid, ethyl ester | 47.84 | 0.5 | 1.96 | 1.23 | 0.02 | 1.17 | 0.92 | 0.15 |
| 5 | C4H5NS | Allyl Isothiocyanate | 6.61 | 3.63 | 0.44 | 0.37 | 0.14 | 0.98 | 0.44 | -- |
| 6 | C7H14O2 | 1-Butanol, 3-methyl-, acetate | 6.86 | 0.13 | 0.12 | 0.08 | 0.48 | 0.19 | 0.15 | 0.12 |
| 7 | C12H24O2 | Decanoic acid, ethyl ester | 29.88 | 0.2 | 0.29 | 0.69 | -- | 0.14 | 0.18 | 0.06 |
| 8 | C14H28O2 | Dodecanoic acid, ethyl ester | 44.49 | 0.02 | 2.23 | 0.05 | -- | 0.09 | 0.07 | -- |
| Thioethers compounds (3) | ||||||||||
| 1 | C2H6S2 | Disulfide, dimethyl | 3.18 | 9.78 | 6.5 | 9.48 | 8.94 | 9.04 | 7.18 | 4.19 |
| 2 | C2H6S4 | Dimethyl tetrasulfide | 21.61 | 0.34 | 1.16 | 4.17 | 2.99 | 0.55 | 0.63 | 4.19 |
| 3 | C6H10S3 | Trisulfide, di-2-propenyl | 25.51 | 0.32 | 0.16 | -- | -- | -- | 0.16 | -- |
| Ketone compounds (1) | ||||||||||
| 1 | C7H10O | trans, trans-3,5-Heptadien-2-one | 11.65 | 0.35 | 10.13 | 11.74 | 10.91 | 1.06 | 1.43 | 3.99 |
| Acid compounds (3) | ||||||||||
| 1 | C6H8O2 | Sorbic Acid | 16.49 | 10.75 | 13.59 | 14.23 | 3.36 | 18.69 | 13.28 | 11.02 |
| 2 | C8H16O2 | Octanoic acid | 20.79 | -- | -- | 0.88 | 1.06 | -- | -- | 0.14 |
| 3 | C10H20O2 | n-Decanoic acid | 20.95 | -- | -- | 3.27 | 0.32 | 0.29 | 0.22 | 0.75 |
| Phenolic compounds (2) | ||||||||||
| 1 | C8H10O | Phenol, 4-ethyl- | 20.3 | 3.48 | 6.03 | 3.36 | 1.38 | 5.08 | 5.91 | 5.06 |
| 2 | C9H12O2 | Phenol, 4-ethyl-2-methoxy- | 24.82 | 1.3 | 2.19 | 1.09 | 0.34 | 2.05 | 2.11 | 1.32 |
| Aromatic compounds (3) | ||||||||||
| 1 | C10H12O | Anethole | 25.08 | 7.38 | 1.09 | -- | -- | -- | 1.09 | -- |
| 2 | C9H9N | Benzenepropanenitrile | 22.99 | -- | 0.51 | 0.44 | 0.12 | 0.58 | 0.6 | 0.4 |
| 3 | C10H10O | 1H-Indene-4-carboxaldehyde, 2,3-dihydro- (9CI) | 24.42 | -- | 1.69 | 1.2 | 0.51 | -- | 0.78 | 0.98 |
| Aldehyde compounds (4) | ||||||||||
| 1 | C5H4O2 | Furfural | 5.38 | -- | 1.04 | 0.86 | 0.98 | 0.55 | 0.56 | 1.87 |
| 2 | C7H6O | Benzaldehyde | 10.1 | 0.17 | 0.66 | 1.23 | 2.33 | 0.66 | 0.66 | 2.05 |
| 3 | C8H8O2 | Benzaldehyde, 4-methoxy- | 23.61 | 1.24 | 0.21 | -- | -- | -- | 0.21 | -- |
| 4 | C7H10O | 2,4-Heptadienal, (E, E)- | 12.42 | -- | -- | 0.61 | 1.48 | -- | -- | -- |
| Hydrocarbon compounds (1) | ||||||||||
| 1 | C8H14 | 5,5-Dimethyl-1,3-hexadiene- | 13.75 | -- | 2.49 | 2.4 | 0.02 | -- | 2.82 | 0.11 |
--: No detection; RT = appearance time; Area = peak area.