Table 3.
Physicochemical properties of examined eye drops with choline salicylate.
| Parameter | Eye drops (mean ± SD, n = 3) |
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|---|---|---|---|---|---|---|
| A | B | C | D | E | F | |
| pH | 7.79 ± 0.011 | 7.50 ± 0.073 | 7.45 ± 0.010 | 7.68 ± 0.066 | 5.65 ± 0.028 | 7.21 ± 0.108 |
| Viscosity (mPa s) | 5.08 ± 0.055 | 11.42 ± 0.095 | 4.21 ± 0.066 | 5.90 ± 0.079 | 4.14 ± 0.111 | 2.44 ± 0.049 |
| Tonicity (mOsm/L) | 299.3 ± 11.6 | 324.7 ± 5.7 | 292.7 ± 17.5 | 292.0 ± 11.5 | 288.7 ± 9.5 | 319.7 ± 6.7 |
| Polymer | HEC | HPMC | MC | PVA | PVP | |
| Abbreviations: PVA – polyvinyl alcohol, PVP – polyvinylpyrrolidone, HPMC – hydroxypropyl methylcellulose, HEC – hydroxyethylcellulose, MC – methylcellulose | ||||||