Table 5.
Content of organic acids in Shanxi aged vinegar samples
| Compound (mgL−1 ) | TB-3-Z | M-3-Z | W-3-Z | S-3-S | S-3-S’ | S-3-D | S-5-Q | S-5-S |
|---|---|---|---|---|---|---|---|---|
| Lactic acid | 24,265.3 | 26,991.6 | 30,336.6 | 12,179.5 | 4612.9 | 14,310.3 | 8218.9 | 2575.7 |
| Acetic acid | 60,610.6 | 48,804.7 | 45,945.9 | 70,002.4 | 87,723.5 | 64,814.1 | 52,965.9 | 54,836.5 |
| Propanoic acid | 110.3 | 71.1 | 60.5 | 302.3 | nd | 60.5 | nd | nd |
| Butanoic acid | 229.0 | 92.2 | 83.7 | 86.2 | 16.9 | 33.4 | 14.3 | 3.5 |
| 3-Methylbutanoic acid | 13.4 | 20.0 | 24.4 | 26.0 | 23.3 | 48.0 | 22.8 | 20.6 |
| Pentanoic acid | 307.0 | 193.1 | 184.4 | 242.6 | 121.5 | 283.9 | 51.5 | 62.8 |
| Hexanoic acid | 5.7 | 0.1 | nd | 0.2 | 0.1 | 2.4 | 0.1 | 0.1 |
| Succinic acid | 933.8 | 577.8 | 505.9 | 212.8 | 249.8 | 469.1 | 125.2 | 166.2 |
| Tartaric acid | 115.2 | 136.9 | 144.0 | 139.6 | 112.5 | 123.2 | 97.0 | 117.2 |
| Citric acid | 530.8 | 229.0 | 354.7 | 45.8 | 3796.6 | 1078.7 | 4441.1 | 4474.2 |