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Orthogonal Test Factor Levels
| Factor | Level 1 | Level 2 | Level 3 |
|---|---|---|---|
| The concentration of the emulsifier (%) | 0.5 | 1 | 1.5 |
| mPEG-PCL contents (mg) | 20 | 40 | 60 |
| The volume ratio of the water phase to the oil phase (W/O) | 3:1 | 5:1 | 7:1 |
| Emulsifying time (min) | 4 | 8 | 12 |
