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麻黄生药中麻黄硷的含量测定,各国药典上所采用的方法都很复杂,费时间。近年来用非水溶液滴定法来测定许多生物硷,可以大大简化测定的手续,节省了时间。Chatten和Pernarowski二氏曾用过氯酸的冰醋酸溶液直接滴定滴鼻剂中的麻黄硷,或先用氯仿抽出,再用过氯酸的冰醋酸溶液滴定。此法简便,迅速,依理可作为测定麻黄生药中麻黄硷的方法,但是生药中成分复杂,能溶于氯仿中的物质很多,可以干扰满定终点,因此需要
The determination of the content of ephedra in ephedra crude drug, the methods used in various countries pharmacopoeia are very complex and time-consuming. In recent years, many non-aqueous titration methods have been used to determine many biological blemishes, which can greatly simplify the procedure of measurement and save time. Chatten and Pernarowski II used chloracetic acid in acetic acid to titrate ephedra in nasal drops directly or with chloroform and titrated with perchloric acid in glacial acetic acid. This method is simple, rapid, and can be used as a method for the determination of ephedra in ephedra crude drug. However, the components in the crude drug are complex, and many substances that can be dissolved in chloroform can interfere with the full-term end point. Therefore, it is necessary to