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过去我厂採用的麻黄膏定量法(系根据伊博恩氏法並加以修改)是:精密秤取样品5 g,放在250 ml,三角燒瓶中,加入10%NaOH溶液10 ml,再加氯化鈉4 g,然后以中性醚振搖提取四次,第一次60 ml,第二、三、四次40 ml,每次加入乙醚后必需輕輕振搖30分鐘,提取的醚液,均傾倒于上敷少許脫脂棉及無水硫酸鈉的小漏斗而濾入另一三角瓶中,合併醚液,在60℃乙以下蒸發,收回至約剩乙醚10 ml,加入0.1N H_2SO_4 10 ml(在必要时可酌量加入
In the past, our company used the quantitative method of the ephedra paste (according to the Ibn’s method and modified it): take precision sample 5 g, place it in 250 ml flask, add 10% NaOH solution 10 ml, add chlorine Sodium 4 g, and then extracted with a neutral ether shaking four times, the first 60 ml, the second, third and fourth 40 ml, each ether must be gently shaken for 30 minutes, the extracted ether, Pour on a small funnel with a small amount of absorbent cotton and anhydrous sodium sulfate and filter into another flask. Combine the ether solution and evaporate at 60°C and below B. Recover approximately 10 ml of ether, and add 0.1 N H_2SO_4 to 10 ml (necessary). Can be added when