ZHENG Li-qing1, LIU Jian-hua2, HAN Wei-xuan1, et al. Preparation of Osthol Microcapsules and Observation of its Release Rate in vitro[J]. Chinese journal of experimental traditional medical formulae, 2011, 17(13): 8-11.
ZHENG Li-qing1, LIU Jian-hua2, HAN Wei-xuan1, et al. Preparation of Osthol Microcapsules and Observation of its Release Rate in vitro[J]. Chinese journal of experimental traditional medical formulae, 2011, 17(13): 8-11. DOI: 10.13422/j.cnki.syfjx.2011.13.021.
蛇床子素缓释微囊的制备及体外释药
摘要
目的:制备蛇床子素缓释微囊并考察其体外释放规律。方法:以明胶、阿拉伯胶为囊材
采用复凝聚法制备微囊
采用紫外分光光度法测含量
均匀设计优化制备工艺。分别以150 mL人工胃液与磷酸盐缓冲液(pH 6.8)为溶出介质
温度(37±0.5)℃
转速100 r·min-1
测定其体外释放度。结果:最佳制备工艺为囊心囊材质量比1∶1.5
温度60℃
戊二醛用量0.8∶120(戊二醛用量/系统体积)
制备的微囊圆整光滑
粒径均匀
平均粒径(51.6±4)μm
包封率85.0%
载药量47.2%
体外缓释时间为6 h
其释药特征符合一级动力学过程。结论:蛇床子素微囊制备工艺简单
成囊性和重复性好
微囊具有明显的缓释效果。
Abstract
Objective:To prepare osthol microcapsules and study its release rate in vitro.Method: Osthol microcapsules were prepared by complex coacervation using gelatin-acacia and uniform design.Osthol content was determined by UV.150 mL artificial gastric and PBS(pH 6.8) were used as releasing media
the temperature was(37±0.5) ℃ and the rate of rotation was 100 r·min-1.Result: The optimized conditions were: the ratio of osthol and coating material of 1∶1.5
temperature of 60 ℃ and a hardening agent of 0.8 per 120 of coacervation system.The microcapsules were round under sphere.The average microcapsules diameters were(51.6±4)μm.And the content of osthol was 47.2% with coating ratio of 85.0%.The microcapsules could be released for 6 h in vitro and its releasing curve fit first-order dynamic equations.Conclusion: The preparation method is simple and osthol microcapsules have obvious sustained-release effect.