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Ternary phase diagram of the oil, surfactant/cosurfactant mixture and water. The black, light and dark grey parts represent the nanoemulsion areas. (A) Labrasol/Transcutol system at a 4:1 ratio, represented by light grey area. Addition of Ceteth at a ratio of 1:1:0.086 (Labrasol/Transcutol/Ceteth) increased the nanoemulsion area to include the dark grey region (the total nanoemulsion area represented by red borders); (B) Lecithin/ethanol system, at a ratio of 1:1.
