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The pH stability of the dye extract (CM) in dH2O monitored for 1 month
| Concentration (mg/ml) | pH (Week 1) | pH (Week 2) | pH (Week 3) | pH (Week 4) |
|---|---|---|---|---|
| 1 | 2.85 | 2.82 | 2.78 | 2.86 |
| 0.5 | 3.03 | 3.10 | 3.06 | 3.08 |
| 0.25 | 3.26 | 3.33 | 3.28 | 3.35 |
| 0.125 | 3.55 | 3.55 | 3.56 | 3.62 |
| 0.0625 | 3.71 | 3.72 | 3.81 | 3.85 |
Abbreviation: CM, cold methanol dye extract.
