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Physicochemical characteristics of OG + HA stored at refrigeration temperature for 90 days.
| Time (Days) | |||||||
|---|---|---|---|---|---|---|---|
| Refrigeration (2–8 °C) |
0 | 7 | 15 | 30 | 45 | 60 | 90 |
| pH | 6.9 + 0.03 | 6.7 + 0.01 | 6.9 + 0.01 | 6.1 + 0.001 | 5.8 + 0.02 | 6.4 + 0.002 | 5.7 + 0.05 |
| Concentration HA (µg/mL) | 11.22 + 0.001 | 5.92 + 0.001 | 9.08 + 0.04 | 8.05 + 0.011 | 6.85 + 0.001 | 6.88 + 0.003 | 5.24 + 0.01 |
| Concentration HA (%) | 100 | 59.79 | 91.71 | 81.31 | 69.19 | 69.49 | 52.92 |
