沙棘总黄酮-聚乙烯吡咯烷酮K30固体分散体的制备、表征及体外溶出研究

摘要

目的:制备沙棘总黄酮(TFH)-聚乙烯吡咯烷酮K30(PVP K30)固体分散体,并对其进行表征及体外溶出研究.方法:采用溶剂法制备不同药载比(1:1、1:2、1:3、1:4、1:5)的TFH-PVP K30固体分散体,以溶出参数Td为指标设计单因素试验筛选药载比,以体外溶出度为指标设计正交试验优选制备工艺中的超声时间、水浴温度和干燥时间,并进行验证.采用扫描电镜法(SEM)、差示扫描量热法(DSC)和傅里叶红外光谱法(FT-IR)对固体分散体进行表征.结果:药载比为1:3时TFH-PVP K30固体分散体的Td最小;最优工艺为超声时间10 min、水浴温度60℃、干燥时间12 h.以此工艺制备的TFH-PVP K30固体分散体90 min的累积溶出度平均值为90.22%(RSD=1.74%,n=3).SEM、DSC与FT-IR结果表明,TFH以无定形分散在PVP K30载体中,二者之间形成氢键.结论:成功制得TFH-PVP K30固体分散体,其体外溶出度明显提高.%OBJECTIVE:To prepare total flavonoids of Hippophae rhamnoides(TFH)-PVP K30 solid dispersion,and to char-acterize and study its in vitro dissolution. METHODS:Solvent method was used to prepare TFH-PVP K30 solid dispersion with dif-ferent drug-loading ratio of 1:1,1:2,1:3,1:4,1:5;single factor test was designed to screen drug-loading ratio using dissolution parameter Td as index;orthogonal test was designed to optimize ultrasonic time,temperature of water bath and drying time for prep-aration technology using in vitro dissolution rate as index,and then validated. SEM,DSC and FT-IR were used to characterize sol-id dispersion. RESULTS:Td of TFH-PVP K30 solid dispersion was the lowest when drug-loading ratio was 1:3. Optimal technolo-gy was ultrasonic time 10 min,temperature of water bath 60 ℃ and drying time 12 h. 90 min accumulative dissolution rate of pre-pared TFH-PVP K30 solid dispersion was 90.22% in average(RSD=1.74%,n=3). The results of SEM,DSC and FT-IR showed that the drug as amorphous form dispersed in the PVP K30,the formation of hydrogen bond of the both. CONCLUSIONS:TFH-PVP K30 solid dispersion is prepared successfully,and in vitro dissolution rate of it is improved significantly.