Table 1. Initial values of mean diameter (nm), polydispersity index (PDI), zeta potential and encapsulation efficiency of suspensions: NP (content benzocaine), NP-control, NPMA (content benzocaine) and NPMA-control (n = 5).
| Particle | Content BENZ | Mean diameter (nm); (PDI) | Zeta potential (mV) | BENZ encapsulation (%) | Concentration (particles.mL-1) |
|---|---|---|---|---|---|
| NP | BENZ | 249.2 (0.144) | - 25.5 | 84.8 | 1.19 x 1017 |
| NP-control | No | 200.1 (0.157) | -19.5 | - | 1.45 x 1017 |
| NPMA | BENZ | 297.5 (0.185) | +44.3 | 72.1 | 1.16 x 1017 |
| NPMA-control | No | 263.7 (0.191) | +46.7 | - | 1.11 x 1017 |