葛根素固体分散体的分散状态及其体外评价

目的制备葛根素缓释固体分散体,考察其分散状态。方法以乙基纤维素为载体,制备葛根素缓释固体分散体,利用X射线衍射试验、差示扫描量热法对葛根素在其中的分散状态进行研究。并对该胶囊进行体外溶出度研究。结果X射线衍射图表明葛根素在固体分散体中有一部分葛根是以分子状态分散,而另一部分可能以微晶体状态分散。差示扫描量热法试验结果表明,所制备的缓释固体分散体中不存在药物结晶。溶出度试验结果表明,该缓释胶囊具有良好的缓释效果。结论采用固体分散技术制备的葛根素缓释固体分散体完全可以使药物达到高度分散状态,制备的葛根素缓释固体分散体具有较好的缓释效果。

Dispersing form of puerarin solid dispersion and its evaluation in vitro

Objective In order to observe the dispersing form, the sustained release solid dispersion was prepared. Methods Sustained-release solid dispersion was prepared by taking ethyl cellulose as carrier. And the X-ray diffraction, differential scanning calotimetery (DSC) were used to evaluate the dispersing form of puerarin in the preparation and to study the solubility in vitro. Results The X-ray diffraction experiment showed that the puerarin was existed in molecuar and minicrystal form. DSC Experiment showed that there is no puerarin crystal in the solid dispersion. The test for stripping showed that thare was a better releasing results in the sustained-release capsula. Conclusion The sustained-release solid dispersion can disperse the puerarin highly to increase its bioavailability. The prepared capsula has a marked sustained-release effect.