OBJECTIVE To prepare vitamin C sustained-release tablets and determine their in vitro release rate.
目的：研制维生素c微囊并制成缓释片剂，评价其体外释放特性。
METHODS Use solvent-non-methods to prepare vitamin C sustained-release tablets, UV method was used to determine its content and the in vitro release rate was determined by rotate basket method.
方法：采用溶剂-非溶剂法制备维生素C微囊，制成缓释片剂，采用紫外分光光度法测定其载药量，采用转篮法测定体外释放特性。
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