title: [Classification study on commodity specification and grade standard of Pseudostellariae Radix].
abstract: OBJECTIVE
  To study the commodity specification and grade standard of Pseudostellaria Radix, for standardizing market order and achieving industrialization, standardization and modernization of Pseudostellariae Radix.
  
  
  METHODS
  The different areas and grade medicinal materials of Pseudostellariae Radix were respectively measured in quantitative characteristics of appearance, and the present grade classification of Pseudostellaria Radix was scientifically verified by the content of polysaccharide. Then the determination data were evaluated by spss correlation analysis, principal component analysis and cluster analysis. So combining with the actual production, the commodity grade standard of Pseudostellariae Radix was formulated.
  
  
  RESULTS
  Correlation analysis indicated that the present grade classification of Pseudostellaria Radix was reasonable, and the more the grade of Pseudostellariae Radix was high, the more the content of polysaccharide was high. Meanwhile, length as a classification index was not suitable for the commodity grade standard of Pseudostellariae Radix. Using principal component analysis and cluster analysis, combining actual production, the thickest diameter, weight of single root tuber and the number of 50 g root tuber were filtrated and the grade was divided into 5 ranks: big, mid- dle, small selected goods, big ungraded goods and small ungraded goods.
  
  
  CONCLUSIONS
  the commodity specification and grade standard of Pseudostellariae Radix that mainly included the thickest diameter, weight of single root tuber and the number of 50 g root tuber was formulated, the standard was divided into 5 grade. Each grade was not only consistent with the present situation of medicinal materials market, it could also reflected the intrinsic quality of Pseudostellariae Radix. In conclusion, the standard could be used as a classifica- tion basis to the commodity specification and grade.
authors.forename: Chuan-Zhi
authors.initials: CZ
authors.lastname: Kang
authors.forename: Tao
authors.initials: T
authors.lastname: Zhou
authors.forename: Lan-Ping
authors.initials: LP
authors.lastname: Guo
authors.forename: Bang-Xing
authors.initials: BX
authors.lastname: Han
authors.forename: Lu-Qi
authors.initials: LQ
authors.lastname: Huang
authors.forename: Cheng-Hong
authors.initials: CH
authors.lastname: Xiao
authors.forename: Hou-Xi
authors.initials: HX
authors.lastname: Xiong
authors.forename: Xue-Mei
authors.initials: XM
authors.lastname: Chen
mesh_terms: D029748:Caryophyllaceae / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000592:standards*; D011786:Quality Control; D012015:Reference Standards
chemical_list: D004365:Drugs, Chinese Herbal