Table 4.
Contents of organic acids in three samples.
| Organic Acids | Content (mg/L) | ||
|---|---|---|---|
| WS | PS | PWS | |
| Tartaric acid | 2027.37 ± 114.87 c | 761.42 ± 24.38 a | 1397.24 ± 144.42 b |
| Pyruvic acid | 1.94 ± 0.41 a | 3.16 ± 0.35 a | 11.60 ± 1.43 b |
| Ascorbic acid | 1.25 ± 0.26 a | 6.88 ± 0.23 a | 33.47 ± 4.48 b |
| Lactic acid | 165.34 ± 35.62 a | 272.60 ± 12.12 b | 541.39 ± 39.89 c |
| Pyroglutamic acid | 42.78 ± 4.94 a | 30.98 ± 1.93 a | 111.21 ± 13.23 b |
| Citric acid | 65.37 ± 6.88 a | 3232.18 ± 93.62 b | 4009.09 ± 458.60 c |
| Succinic acid | 260.38 ± 81.65 a | 3699.27 ± 170.89 b | 3793.55 ± 431.01 c |
| Propionic acid | 202.51 ± 33.90 c | 3.64 ± 1.72 a | 70.39 ± 14.34 b |
| Total | 2787.91 ± 235.09 b | 8010.15 ± 368.87 a | 9967.97 ± 1354.13 c |
Note: Different letters in the same row represent significant differences according to Duncan’s test (p < 0.05).