With three different methods,the total flavonoids from the roots of cultivated Glycyrrhiza pallidiflora Maxim.were determined and compared by ultraviolet-visible spectrophotometry.The results showed that the extract y...With three different methods,the total flavonoids from the roots of cultivated Glycyrrhiza pallidiflora Maxim.were determined and compared by ultraviolet-visible spectrophotometry.The results showed that the extract yield of total flavonoids in crude extractswas 4.54% by directdetermination method,4.27% by Al(NO3)3colorimetry method and 2.09% by AlCl3 colorimetry method.The content of total flavonoids in roots of cultivated G.pallidiflora was only 0.05%.The cultivated G.pallidiflora in Lanzhou is not unfit for the medicine source of flavonoids.展开更多
文摘With three different methods,the total flavonoids from the roots of cultivated Glycyrrhiza pallidiflora Maxim.were determined and compared by ultraviolet-visible spectrophotometry.The results showed that the extract yield of total flavonoids in crude extractswas 4.54% by directdetermination method,4.27% by Al(NO3)3colorimetry method and 2.09% by AlCl3 colorimetry method.The content of total flavonoids in roots of cultivated G.pallidiflora was only 0.05%.The cultivated G.pallidiflora in Lanzhou is not unfit for the medicine source of flavonoids.