Arg.by preliminary test.Methods:The extracted mix-ture of Mallotus barbatus(Wall.) Muell.Arg.from petroleum ether,purified water and 95%ethanol were studied by test tube method.

• 方法:采用试管法,对毛桐根的石油醚、水、95%25乙醇提取物进行研究,通过多种指示剂和显色剂的沉淀反应或颜色反应,初步推断毛桐根中可能含有的化学成分。