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Factors and levels of the L9 (34) orthogonal design for SLNs (solid lipid nanoparticles).
| Variable | Level | ||
|---|---|---|---|
| 1 | 2 | 3 | |
| Type (A) | PVA (Polyvinyl alcohol) | PVP (Poly-vinyl pyrrolidone) | Poloxamer188 |
| Concentration (B) | 1% | 2% | 3% |
| Volume (C) | 15 mL | 20 mL | 25 mL |
(A) emulsifier type; (B) aqueous phase concentration; (C) aqueous phase volume.
