Table 4 Conductivity, pH and centrifugation stability of multiple emulsions kept at different storage conditions for 30 days
8°C | 25°C | 40°C | 40°C with 75% RH | |
|---|---|---|---|---|
pH* | ||||
24 h | 5.00 ± 0.09 | 5.19 ± 0.20 | 4.99 ± 0.18 | 4.99 ± 0.07 |
7 d | 4.97 ± 0.14 | 5.14 ± 0.07 | 4.91 ± 0.09 | 4.95 ± 0.10 |
15 d | 4.92 ± 0.15 | 5.12 ± 0.02 | 4.90 ± 0.10 | 4.93 ± 0.07 |
30 d | 5.35 ± 0.06 | 5.05 ± 0.04 | 5.12 ± 0.12 | 4.99 ± 0.12 |
Conductivity** | ||||
24 h | 76.40 ± 1.90 | 76.37 ± 1.19 | 66.50 ± 1.80 | 63.53 ± 1.51 |
7 d | 83.30 ± 1.37 | 85.90 ± 3.90 | 77.50 ± 1.71 | 69.83 ± 3.00 |
15 d | 84.27 ± 1.32 | 89.87 ± 1.90 | 79.20 ± 3.30 | 74.20 ± 2.08 |
30 d | 89.17 ± 2.80 | 57.73 ± 2.14 | 93.00 ± 1.20 | 60.30 ± 2.39 |
Centrifugation stability*** | ||||
24 h | S | S | S | S |
7 d | S | S | S | S |
15 d | S | S | S | S |
30 d | S | S | S | S |