title: [Quality control of traditional Tibetan Medicine Zsuotai].
abstract: OBJECTIVE
  To establish the method of quality control for traditional Tibetan Medicine Zsuotai.
  
  
  METHODS
  Collecting the samples of Tsuotai from Qinghai, Tibet, Sichuan, and Gansu province, to detect Hg2+ by Zsuotai reacted with HCl-HNO3 (3:1), and to determine the quantity of HgS in Zsuotai by sulfocyanate volumetric method.
  
  
  RESULTS
  The method for the determination of HgS in Zsuotai was in good reproducibility (RSD = 0.68%). The calibration curve was linear (r = 0.9999) within -0.0002 - 0.2123 g of mercuric sulfide. The recovery was 100.94% (RSD = 0.66%).
  
  
  CONCLUSIONS
  This method is convenient and accurate, so it can be used to establish quality control of the medicinal material.
authors.affiliation: Northwest Plateau Institute of Biology, Chinese Academy of Sciences/Qinghai Key Laboratory of Tibet Medicine Pharmacology and Satety Evaluation, Xining 810008, China. xiazhenjiang6184@163.com
authors.forename: Zhen-jiang
authors.initials: ZJ
authors.lastname: Xia
authors.forename: Li-xin
authors.initials: LX
authors.lastname: Wei
authors.forename: Dong-ping
authors.initials: DP
authors.lastname: Wang
authors.forename: Yu-zhi
authors.initials: YZ
authors.lastname: Du
authors.forename: Xian-min
authors.initials: XM
authors.lastname: Chen
authors.forename: Hong-xia
authors.initials: HX
authors.lastname: Yang
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry* / Q000592:standards; D008419:Materia Medica / Q000737:chemistry* / Q000592:standards; D038861:Medicine, Tibetan Traditional; D017669:Mercury Compounds / Q000032:analysis*; D011786:Quality Control; D013678:Technology, Pharmaceutical / Q000379:methods; D013861:Thiocyanates; D018609:Tibet
chemical_list: D004365:Drugs, Chinese Herbal; D008419:Materia Medica; D017669:Mercury Compounds; D013861:Thiocyanates