title: [A comparative research on quality of Vitmin C Yinqiao tablets from different manufacturers].
abstract: OBJECTIVE
  To study the different manufacturers Vitmin C (Vc) Yinqiao tablets, and the quality of the analysis of the problem, to provide a theoretical basis for the correct evaluation of the quality of medicines and improving the standard drugs.
  
  
  METHODS
  11 manufacturers of 18 batches of samples for determination of the weight of the core tablets, powder samples were observed with microscope, determination of Vc, and the establishment of the Vc Yinqiao tablets HPLC method for determination of chlorogenic acid and arctigenin, chlorogenic acid and arctigenin in the samples were measured and compared.
  
  
  RESULTS
  There is a big difference of microscope and various measured results in different manufacturers products.
  
  
  CONCLUSIONS
  Because different manufacturers to produce the same, there are big differences in the quality of the products.
authors.affiliation: Foshan Dezhong Phamaceutical Co. Ltd., Foshan 528000, China. zwn100@126.com
authors.forename: Wei-nan
authors.initials: WN
authors.lastname: Zhang
authors.forename: Yu
authors.initials: Y
authors.lastname: Xiang
authors.forename: Yuan-yuan
authors.initials: YY
authors.lastname: Jiang
authors.forename: Zhuo-ming
authors.initials: ZM
authors.lastname: Li
authors.forename: Zhi-hua
authors.initials: ZH
authors.lastname: Zhang
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
authors.forename: Li
authors.initials: L
authors.lastname: Li
mesh_terms: D031170:Arctium / Q000737:chemistry; D001205:Ascorbic Acid / Q000737:chemistry*; D002726:Chlorogenic Acid / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D004338:Drug Combinations; D004365:Drugs, Chinese Herbal / Q000737:chemistry* / Q000302:isolation & purification / Q000592:standards; D005663:Furans / Q000032:analysis*; D017705:Lignans / Q000032:analysis*; D031239:Lonicera / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry; D011786:Quality Control; D013607:Tablets
chemical_list: D004338:Drug Combinations; D004365:Drugs, Chinese Herbal; D005663:Furans; D017705:Lignans; D013607:Tablets; D002726:Chlorogenic Acid; D001205:Ascorbic Acid; C071942:arctigenin