Effect of pH on the concentration of molecular sulfur dioxide (SO2) in a wine with a free SO2 concentration of 50 mg/L (Divol et al. 2012).
| pH | Molecular SO2 (mg/L) | Molecular SO2 (% free SO2) |
|---|---|---|
| 2.8 | 4.64 | 9.28 |
| 3.0 | 3.03 | 6.06 |
| 3.2 | 1.96 | 3.91 |
| 3.4 | 1.25 | 2.51 |
| 3.6 | 0.80 | 1.60 |
| 3.8 | 0.51 | 1.01 |
| 4.0 | 0.32 | 0.64 |
| 4.2 | 0.20 | 0.41 |