| Ethanol/ H2O | Decolorization rate (%) | |||||
| 5 min | 10 min | 15 min | 20 min | 25 min | 30 min | |
| 1:2 | 10.3 | 31.7 | 78.9 | 89.9 | 92.4 | 92.4 |
| 1:1 | 3.5 | 65.7 | 80.6 | 85.9 | 91.2 | 93.4 |
| 2:1 | 75.0 | 82.4 | 87.8 | 93.3 | 99.9 | 99.9 |
| 3:1 | 72.3 | 88.9 | 96.9 | 99.9 | 99.9 | 99.9 |