| Test item | NF (mg∙L−1) | LF (mg∙L−1) |
| Acetic acid | 52.42 | 57.13 |
| Propionic Acid | 10.63 | 15.99 |
| Isobutyric acid | 1.02 | 5.07 |
| n-Butyric acid | 1.18 | 7.17 |
| Isovaleric acid | 1.02 | 2.01 |
| n-Valeric acid | 1.10 | 2.13 |