551. Cellulose acetate/chitosan multimicrospheres preparation and ranitidine hydrochloride release in vitro.
- Author
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Zhou HY, Chen XG, Liu CS, Meng XH, Liu CG, He J, and Yu le J
- Subjects
- Cellulose chemistry, Delayed-Action Preparations, Dose-Response Relationship, Drug, Hydrogen-Ion Concentration, Microspheres, Particle Size, Spectroscopy, Fourier Transform Infrared, Cellulose analogs & derivatives, Chitosan chemistry, Histamine H2 Antagonists chemistry, Ranitidine chemistry
- Abstract
A noval cellulose acetate/chitosan multimicrospheres (CACM) was prepared by the method of w/o/w emulsion. The concentration of cellulose acetate (CA) and the ratio of CA/chitosan (CS) had influence on the CACM size, and appearance. Ranitidine hydrochloride loading, and releasing efficiency in vitro were investigated. The optimal condition for preparation of the microspheres was CA concentration at 2% and the ratio of CA/CS at 3/1. The microspheres size was 200-350 microm. The appearance of microspheres was spherical, porous, and nonaggregated. The highest loading efficiency was 21%. The ranitidine release from the CACM was 40% during 48 hr in buffers.
- Published
- 2006
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