缓冲盐对大孔吸附树脂分离阿魏酸脂质体及游离药物的影响

目的：研究缓冲盐对不同型号大孔吸附树脂分离脂质体及其游离药物能力的影响,并对阿魏酸脂质体进行质量评价。方法：采用缓冲盐（Na₂HPO₃-NaH₂PO₃）平衡的大孔吸附树脂分离脂质体与游离药物,用高效液相色谱检测药物含量,计算包封率。结果：该法在0.56~2.8 μg· mL^-1线性关系良好（r=0.999 6）,精密度小于1.1%。缓冲盐平衡后的大孔吸附树脂对脂质体的吸附作用均有所降低,且不影响大孔吸附树脂对阿魏酸的吸附能力。其中HPD450对空白脂质体的回收率在97.2%~100.8%,平均回收率为98.1%。结论：缓冲盐可提高大孔吸附树脂分离脂质体及游离药物的能力。

Study on influence of buffer system on separate capacity of macroporous resin on ferulic liposome

OBJECTIVE: To study the effect of buffer on separate capacity of macroporous resin. To evaluate the quality of ferulic acid liposome and determine its entrapment efficiency. METHOD: Different type of macroporous resin counterpoised by buffer system of Na2 HPO3-NaH2, PO3 was used to separate the free ferulic acid from the preparation and HPLC was used to determine the concentration of the ferulic acid to calculate the entrapment efficiency. RESULT: This method had good linearity in the range of 0.56 - 2.8 g x mL(-1) (r = 0.999 6). The precision RSD was less than 1.1%. The adsorption effect of macroporous resin on liposome was reduced while it had no effect on the absorption ability of macroporous resin on the ferulic acid by the usage of buffer. The recovery of HPD450 resin on blank liposome was between 97.2% - 100.8%, while the average recovery is 98.1%. CONCLUSION: Buffer system can enhance the separate ability of macroporous resin on liposome and free drug.