Table 2. Compositions of Selected Microemulsions (% w/w) and Particle Size (mean±SD, n=3).
| Formulation | Factorial | S/C | % Oil | % (S+C) | % Water | Particle size (nm) | Polydispersity |
| ME-1 | + + + | 6:1 | 40 | 50 | 10 | 7.03±0.2nm | 0.348±0.012 |
| ME-2 | + + - | 6:1 | 40 | 55 | 5 | 79.8±0.7 nm | 0.347±0.025 |
| ME-3 | + - + | 6:1 | 20 | 70 | 10 | 53.6±0.5 nm | 0.346±0.016 |
| ME-4 | + - - | 6:1 | 20 | 74 | 5 | 10.3±1.2 nm | 0.341±0.021 |
| ME-5 | - - - | 4:1 | 20 | 75 | 5 | 21.9±0.6 nm | 0.347±0.018 |
| ME-6 | - - + | 4:1 | 20 | 70 | 10 | 34.5±1.3 nm | 0.348±0.023 |
| ME-7 | - + - | 4:1 | 40 | 55 | 5 | 10.3±0.5 nm | 0.348±0.021 |
| ME-8 | - + + | 4:1 | 40 | 50 | 10 | 11.6±0.3 nm | 0.347±0.014 |
| +: high level; - : low level |