Table 4.
Blank | pH | Zeta Potential (mV) | Solubility (mg/mL) | Size (nm) | % Intensity | PdI |
T | 6.00 ± 0.02 a | −8.26 ± 4.03 | - | 13.86 ± 4.30 | 100.0% | 0.132 |
TP | 6.94 ± 0.01 | −8.09 ± 1.87 | - | 19.93 ± 8.03 | 96.8% | 0.205 |
P | 7.22 ± 0.01 | −3.32 ± 8.93 | - | See Table S2 | ||
Cyclosporine | pH | Zeta Potential (mV) | Solubility (mg/mL) ¶ | Size (nm) | % Intensity | PdI |
T | 6.82 ± 0.07 | n.d. | 4.84 ± 0.45 | 12.96 ± 4.03 | 100.0% | 0.091 |
TP | 6.88 ± 0.02 | −0.02 ± 0.20 e | 0.99 ± 0.23 | 20.31 ± 9.66 | 100.0% | 0.192 |
P | 7.04 ± 0.01 | n.d. | 0.57 ± 0.38 | n.d. | ||
Econazole Nitrate | pH | Zeta Potential (mV) | Solubility (mg/mL) # | Size | % Intensity | PdI |
T | 3.36 b ± 0.02 | 9.13 ± 1.48 | 3.69 ± 0.20 | 7.21 ± 2.15 | 100.0% | 0.076 |
T c | 5.1 d ± 0.14 | n.d. | n.d. | 12.02 ± 3.58 | 100.0% | 0.094 |
TP | 4.23 ± 0.10 | 4.52 ± 1.68 | 4.15 ± 0.17 | 17.85 ± 8.50 | 99.5% | 0.19 |
P | 4.23 ± 0.10 | −0.71 ± 1.48 | 3.79 ± 0.56 | n.d. | ||
Dexamethasone | pH | Zeta Potential (mV) | Solubility (mg/mL) # | Size | % Intensity | PdI |
T | 6.54 ± 0.16 | −11.39 ± 2.94 | 0.59 ± 0.03 | 13.44 ± 4.29 | 97.7% | 0.165 |
TP | 6.94 ± 0.02 | −10.55 ± 4.69 | 0.53 ± 0.09 | 21.39 ± 11.54 | 99.6% | 0.222 |
P | 7.10 ± 0.03 | −10.99 ± 3.30 | 1.11 ± 0.10 | n.d. |
¶ measured at 36 days; # measured at 30 days; a blank T micelles brought to pH 3.3 have a comparable size (11.7 ± 2.4 nm); b at this pH, the logD is 2.4 and the % of unionized form is about 0.08% [30]; c addition of NaOH 0.5 M; d at this pH, the logD is 4.4 and the % of unionized form is about 8% [30]; e from a previous work [7], sample dilution 1:20.