RESUMO
AIM To prepare nanostructured lipid carriers for volatile oils from Artemisiae argyi Folium.METHODS Heated melting-ultrasonic dispersion method was applied to preparing lipid carriers.Taking solid/liquid lipid ratio,amounts of lipid,emulsifier and volatile oils as influencing factors,and average paticle size as an evaluation index,the formulation was optimized by orthogonal test.With cineole,camphor and borneol as indices,GC-MS was adopted in the content determination of volatile oils.RESULTS The optimal formulation was determined to be 5 ∶ 5 for solid/liquid lipid ratio,1％,3％ and 0.5％ for amounts of lipid,emulsifier and volatile oils,respectively.The obtained clear and transparent lipid carriers demonstrated the average particle size of (72.33 ±1.93) nm,PDI of 0.273 ± 0.004 5,and Zeta potential of (-30.59 ± 1.42) mV,whose in vitro release rate was lower than that of raw medicine within 120 h,along with a higher stability under 4 ℃ than that under 25 ℃.The entrapment efficiencies of cineole,camphor and borneol were 87.49％,86.45％ and 92.12％ with the drug loadings of 8.25％,2.00％ and 3.38％,respectively.CONCLUSION It is suggested that nanostructured lipid carriers for volatile oils from Artemisiae argyi Folium should be stored under 4 ℃ with the features of sustainedrelease and stable physicochemical properties.