2006•Zhiwu ziyuan yu huanjingRequires access

Extraction and analysis of total flavonoids from roots of cultivated Glycyrrhiza pallidiflora

Ji Zhang, Jian Nian Yao

Abstract

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(NO_(3))_(3)colorimetry method and 2.09% by AlCl_(3) 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.

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Key concepts: Glycyrrhiza, Colorimetry, Chemistry, Extraction (chemistry), Kjeldahl method, Food science, Botany, Spectrophotometry