摘要
采用系数倍率法测定安钠咖注射液中咖啡因和苯甲酸钠的含量,样品不经分离,直接在230和272nm 测定吸光度。注意选择 K 值≤1,以提高精确度。咖啡因和苯甲酸钠的平均回收率分别为100.6%(cv0.51%)和100.4%(cv 0.25%)。
K-ratio spectrophotometry at 230 and 272nm,selecting the Kless than 1,was applied to the determination of caffeine and sodium benzoate incaffeine and sodium benzoate injection.This method is simple and rapid withoutany separation.The results obtained were satisfactory both in precision and in re-covery.The average recovery of caffeine was 100.6%(cv 0.51%)and that ofsodium benzoate was 100.4%(cv 0.25%).
出处
《中国医药工业杂志》
CAS
CSCD
北大核心
1992年第10期455-457,共3页
Chinese Journal of Pharmaceuticals
关键词
安钠咖注射液
咖啡因
苯甲酸钠
K-ratio spectrophotometry
caffeine and sodium benzoate injection
caffeine
sodium benzoate
