Pseudoternary phase diagrams indicating o/w nanoemulsion region of Capryol 90 (oil), water, Tween 20 (surfactant), and Carbitol (cosurfactant) at different S
mix ratios indicated in a (S
mix 1:0), b (S
mix 1:1), c (S
mix 2:1), d (S
mix 3:1), e (S
mix 1:2), and f (S
mix 1:3)