The microemulsion was prepared with the system of ethyl oleate (4%), Tween-80 (30%), PEG400 (15%) and water (51%). The microemulsion was clear and transparent with an average diameter of 34.8 nm.

• 微乳处方组成为:油酸乙酯4%25；吐温-8030%25；PEG 40015%25；水51%25；所得O/W型微乳澄清透明；平均粒径为34.；8nm。