In contrast with different extraction methods, the alkannin could be extracted quickly and effectively by the ultrasonic wave.

研究了超声波法和有剂法取天然紫草色工条件,超声波法可明显高色取速率。

In order to provide a basis for the research and development of gromwell,the studies on domestic extraction of alkannin was reviewed in briefly.

对国内有关紫草色取概况进行了综述,为研究和开发紫草供依据。