Extraction and purification technology of total flavone compounds from Herba hedyotids chrysotrichae.
The extraction technology of total flavone compounds in Herba hedyotids chrysotrichae was studied by using L9(34)orthogonal experiment design in this paper.The optimum extraction technology was to extract flavones compounds for 1.5 h with 70% ethanol,which was twelve times of volume as large as the weight of the Herba hedyotids chrysotrichae,and extracting 2 times.NKA-9 type resin was chosen to purify total flavone compounds,and polysaccharid was removed by washing with water(pH5).Finally,total flavone compounds content reached at 43.1%.