Table I.
Effect of Storage Temperature and Time on the Mean Droplet Diameter and Zeta Potential Values of Castor Oil-Based Nano-sized Emulsion
| Storage time (months) | Physicochemical properties | |||||
|---|---|---|---|---|---|---|
| Mean droplet diameter (nm) at different storage temperature (°C) | Zeta potential (mV) at different storage temperature (°C) | |||||
| 4 | 25 | 37 | 4 | 25 | 37 | |
| 0 | 243 (±45) | 243 (±48) | 243 (±38) | 41.4 (±1.24) | 40.5 (±1.80) | 47.3 (±1.91) |
| 1 | 250 (±56) | 238 (±50) | 240 (±35) | – | – | – |
| 3 | 235 (±45) | 230 (±46) | 228 (±46) | – | – | – |
| 6 | 221 (±52) | 221 (±40) | 218 (±50) | 37.8* (±0.89) | 37.2* (±2.35) | 30.6* (±1.37) |
Three independent emulsion samples for each storage temperatures (3 × 3 = 9 emulsions) were used
– Not determined
Figures in parentheses indicate standard deviation (n = 3)
*p < 0.05