METHOD Alkaloid was first turned into hydrochloric alkaloid, which was made to react with bromothymol blue, and the total alkaloid was then extracted using chloroform for determination.

• 方法采用将生物碱变成盐酸生物碱,再和溴麝香草酚蓝络合反应后,用氯仿萃取出总生物碱比色测定。