↓Formulation (PFO:LEO) pH value   (25 ± 2°C) (45 ± 2°C) Time (day)→ 1 7 30 1 7 30 (5:1) 5.97 ± 0.05 5.98 ± 0.05 5.95 ± 0.05 5.97 ± 0.005 5.92 ± 0.005 5.77 ± 0.02 (5:2) 5.97 ± 0.0058 5.97 ± 0.0058 5.96 ± 0 5.97 ± 0.0058 5.90 ± 0.0058 5,80 ± 0,010 (5:5) 5.96 ± 0 5.96 ± 0.0058 5.96 ± 0.0058 5.96 ± 0 5.84 ± 0.021 - (-) not performed

Table 16: PFO:LEO (5:1, 5:2, 5:5) nanoemulsions pH values subjected to different temperatures for 1, 7 and 30 days.