title: [Identification and evaluation of TCM shayuanzi].
abstract: OBJECTIVE
  To understand the varieties of Shayuanzi on sale and establish the method for evaluating its quality.
  
  
  METHODS
  22 samples collected from all over the country were identified by TLC and the contents of total flavone in them were determined with UV.
  
  
  RESULTS
  All samples could be classified into three varieties, and they could be identified by TLC. The contents of total flavone in them were 0.3%-1.0%.
  
  
  CONCLUSIONS
  Shayuanzi on sale mainly includes Astragalus complanatus, and there are A. adsuragen and A. sinicus as well. TLC is a better method for the identification of shayuanzi. The total flavone in A. complanatus is 0.33%-0.82%.
authors.affiliation: Beijing University of Traditional Chinese Medicine, Beijing 100102, China. yjzh@263.net
authors.forename: Yu-jie
authors.initials: YJ
authors.lastname: Zhang
authors.forename: Jian-jun
authors.initials: JJ
authors.lastname: Zhang
authors.forename: Xing-li
authors.initials: XL
authors.lastname: Yan
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.forename: Yu
authors.initials: Y
authors.lastname: Tang
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
mesh_terms: D027883:Astragalus Plant / Q000737:chemistry* / Q000145:classification; D002855:Chromatography, Thin Layer; D004340:Drug Contamination; D047309:Flavones; D005419:Flavonoids / Q000032:analysis*; D010946:Plants, Medicinal / Q000737:chemistry*; D011786:Quality Control; D012639:Seeds / Q000737:chemistry; D013045:Species Specificity
chemical_list: D047309:Flavones; D005419:Flavonoids; C043562:flavone