The effects of light wave on the stability of fen'ate solution have been examined. The results showed that UV-light accelerates the decomposition of ferrate with decomposition rate 1.6 times as much as that in dar...The effects of light wave on the stability of fen'ate solution have been examined. The results showed that UV-light accelerates the decomposition of ferrate with decomposition rate 1.6 times as much as that in dark whereas infrared light has only unclear effect on the stability of ferrate, with decomposition rate 1.1 times as much as in dark. The polythene container is found to the best for preservation of ferrate solution in dark.展开更多
目的:筛选确定头孢克洛胶囊的溶出方法,并进行头孢克洛溶液稳定性研究。方法:以头孢克洛胶囊为参比制剂,紫外分光光度计264 nm波长下,比较其在不同条件下的溶出曲线。结果:转篮法50 r·min-1条件下制剂呈现更好的溶出行为,水和p H 4...目的:筛选确定头孢克洛胶囊的溶出方法,并进行头孢克洛溶液稳定性研究。方法:以头孢克洛胶囊为参比制剂,紫外分光光度计264 nm波长下,比较其在不同条件下的溶出曲线。结果:转篮法50 r·min-1条件下制剂呈现更好的溶出行为,水和p H 4. 0介质溶出趋势显著,p H 1. 2和p H 6. 8介质呈现快速溶出,p H 6. 8介质中终溶出量低于90%,可能有降解现象。溶液稳定性实验证明,头孢克洛在p H 6. 8介质中15 min就已经开始降解,2 h后降解量达46%,其他介质中未见明显降解。结论:在头孢克洛胶囊仿制药质量和疗效一致性评价中,可首选转篮法50 r·min-1作为溶出曲线测定方法,鉴于其在p H 6. 8介质中有降解,样品测定时,不宜长时间放置。展开更多
文摘The effects of light wave on the stability of fen'ate solution have been examined. The results showed that UV-light accelerates the decomposition of ferrate with decomposition rate 1.6 times as much as that in dark whereas infrared light has only unclear effect on the stability of ferrate, with decomposition rate 1.1 times as much as in dark. The polythene container is found to the best for preservation of ferrate solution in dark.
文摘目的:筛选确定头孢克洛胶囊的溶出方法,并进行头孢克洛溶液稳定性研究。方法:以头孢克洛胶囊为参比制剂,紫外分光光度计264 nm波长下,比较其在不同条件下的溶出曲线。结果:转篮法50 r·min-1条件下制剂呈现更好的溶出行为,水和p H 4. 0介质溶出趋势显著,p H 1. 2和p H 6. 8介质呈现快速溶出,p H 6. 8介质中终溶出量低于90%,可能有降解现象。溶液稳定性实验证明,头孢克洛在p H 6. 8介质中15 min就已经开始降解,2 h后降解量达46%,其他介质中未见明显降解。结论:在头孢克洛胶囊仿制药质量和疗效一致性评价中,可首选转篮法50 r·min-1作为溶出曲线测定方法,鉴于其在p H 6. 8介质中有降解,样品测定时,不宜长时间放置。