Table 4.
Content of volatile compounds in Shanxi aged vinegar samples (n = 3)
| Compound | TB-3-Z | M-3-Z | W-3-Z | S-3-S | S-3-S’ | S-3-D | S-5-Q | S-5-S |
|---|---|---|---|---|---|---|---|---|
| Esters (μgL−1 ) | ||||||||
| Ethyl acetate | 3703.9 ± 251.3 | 80,854.7 ± 7919.6 | 90,785.0 ± 12,014.8 | 45,465.0 ± 1472.1 | 37,387.7 ± 3886.8 | 158,030.9 ± 29,217.8 | 93,177.8 ± 16,845.5 | 13,821.8 ± 2731.4 |
| 3-Methylbutyl acetate | nd | nd | 32.8 ± 2.9 | 23.1 ± 1.8 | 21.2 ± 1.9 | 141.0 ± 1.7 | 1.4 ± 0.1 | 2.0 ± 0.1 |
| Ethyl lactate | 7553.2 ± 164.1 | 40,952.2 ± 376.8 | 57,241.5 ± 453.1 | 51,394.6 ± 360.7 | 17,231.5 ± 190.1 | 50,019.6 ± 595.0 | 15,123.3 ± 124.0 | 13,020.3 ± 188.3 |
| Ethyl benzoate | 2.2 ± 0.02 | 5.1 ± 0.1 | 5.9 ± 0.1 | 2.4 ± 0.1 | 13.0 ± 2.0 | 2.5 ± 0.1 | 3.5 ± 0.1 | 2.4 ± 0.1 |
| Ethyl benzeneacetate | 10.1 ± 0.02 | 18.4 ± 0.3 | 22.7 ± 0.3 | 12.9 ± 0.1 | 14.9 ± 0.9 | 22.4 ± 0.3 | 13.3 ± 0.3 | 11.2 ± 0.1 |
| Phenethyl acetate | 466.7 ± 17.1 | 254.0 ± 4.5 | 236.6 ± 3.0 | 361.3 ± 5.6 | 326.3 ± 11.0 | 624.4 ± 0.4 | 230.7 ± 9.7 | 204.8 ± 2.3 |
| Heterocyclic (mgL−1 ) | ||||||||
| Trimethyl-Oxazole | 25.45 ± 0.12 | 10.26 ± 0.65 | 6.42 ± 0.72 | 1.44 ± 0.24 | 1.02 ± 0.36 | 6.33 ± 0.3 | 0.40 ± 0.03 | 0.30 ± 0.08 |
| 2,3-Dimethylpyrazine | 1.96 ± 0.05 | 1.96 ± 0.13 | 1.81 ± 0.14 | 2.70 ± 0.20 | 1.72 ± 0.05 | 3.50 ± 0.28 | 1.06 ± 0.06 | 1.10 ± 0.07 |
| 2,3,5-Trimethylpyrazine | 12.05 ± 0.25 | 5.72 ± 0.34 | 5.46 ± 0.27 | 4.79 ± 0.13 | 4.49 ± 0.04 | 9.34 ± 0.49 | 2.72 ± 0.11 | 2.69 ± 0.16 |
| Tetramethylpyrazine | 127.13 ± 2.95 | 20.34 ± 1.41 | 23.44 ± 0.77 | 33.05 ± 1.35 | 19.65 ± 1.00 | 69.07 ± 5.97 | 9.38 ± 0.22 | 9.71 ± 0.81 |
| Alcohols (μgL−1 ) | ||||||||
| 3-Methyl-1-butanol | 1472.5 ± 234.0 | 627.7 ± 57.9 | 370.2 ± 28.3 | 50.5 ± 3.9 | 56.8 ± 3.2 | 390.1 ± 10.0 | 7.7 ± 0.6 | 3.9 ± 0.3 |
| 2-Ethylhexanol | 25.3 ± 2.0 | 28.1 ± 2.8 | 16.8 ± 2.9 | 18.0 ± 7.5 | 27.1 ± 14.5 | 17.1 ± 7.6 | 15.5 ± 2.6 | 13.8 ± 1.2 |
| Furfuryl alcohol | 1621.7 ± 10.7 | nd | nd | 7325.8 ± 54.2 | 3895.2 ± 24.2 | 2332.5 ± 50.3 | 1730.1 ± 17.2 | 1049.4 ± 15.2 |
| Phenylethyl alcohol | 24,814.5 ± 24.5 | 14,839.7 ± 508.8 | 14,468.4 ± 513.5 | 28,098.0 ± 293.2 | 24,694.1 ± 714.5 | 39,014.4 ± 2997.9 | 15,515.0 ± 313.1 | 15,075.7 ± 197.7 |
| Aldehydes (mgL−1 ) | ||||||||
| Furfural | 88.39 ± 2.29 | 27.57 ± 5.21 | 20.14 ± 1.9 | 110.78 ± 7.14 | 41.28 ± 5.25 | 236.34 ± 25.89 | 38.21 ± 3.7 | nd |
| Benzaldehyde | 1.07 ± 0.04 | 3.01 ± 0.15 | 3.17 ± 0.34 | 0.73 ± 0.03 | 0.57 ± 0.02 | 3.22 ± 0.41 | 0.73 ± 0.02 | 0.75 ± 0.02 |
| 5-Methyl furfural | 4.08 ± 0.15 | nd | 0.67 ± 0.05 | 0.78 ± 0.14 | nd | 2.92 ± 0.12 | nd | nd |
| Ketones (mgL−1 ) | ||||||||
| 2,3-Butanedione | 12.38 ± 2.54 | 8.94 ± 1.00 | 6.06 ± 0.82 | 3.07 ± 0.02 | 3.78 ± 0.60 | 6.80 ± 0.71 | 3.26 ± 0.96 | 2.75 ± 0.06 |
| Acetoin | 1880.61 ± 27.61 | 745.63 ± 30.63 | 686.84 ± 59.06 | 3302.52 ± 93.12 | 2093.34 ± 103.51 | 4036.59 ± 664.34 | 1694.62 ± 182.20 | 1550.90 ± 168.93 |
| 2-Furyl methyl ketone | 1.88 ± 0.01 | 0.93 ± 0.05 | 1.03 ± 0.05 | 1.09 ± 0.01 | 0.67 ± 0.02 | 1.77 ± 0.23 | 0.65 ± 0.04 | 0.53 ± 0.02 |
| Phenols (μgL−1 ) | ||||||||
| Guaiacol | 516.7 ± 5.9 | 318.8 ± 12.6 | 308.7 ± 7.2 | 619.9 ± 8.3 | 291.0 ± 6.3 | 775.2 ± 46.7 | 222.1 ± 5.9 | 211.8 ± 2.0 |
| Creosol | 242.8 ± 1.2 | 304.2 ± 3.7 | 275.3 ± 5.5 | 1524.9 ± 36.5 | 507.1 ± 8.4 | 837.6 ± 57.8 | 919.8 ± 16.1 | 323.7 ± 4.5 |
| Phenol | 257.5 ± 2.1 | 573.7 ± 55.2 | 448.0 ± 40.9 | 167.8 ± 9.7 | 35.4 ± 14.1 | 656.6 ± 66.6 | 208.6 ± 30.7 | 235.2 ± 25.7 |