title: [Studies on IR fingerprint of tongren dahuoluo pills and tongren niuhuangqingxin pills].
abstract: OBJECTIVE
  To identify Tongren Dahuoluo pills and Tongren Niuhuangqingxin pills respectively by analysis of IR fingerprint.
  
  
  METHODS
  Both drugs were extracted with hexane, ethylether and butanone respectively and then the obtained extracts were measured with the ET-IR spectrometer.
  
  
  RESULTS
  By analyzing IR fingerprint of 25 batches of Tongren Dahuoluo pills and 27 batches of Tongren Niuhuangqingxin pills, we found that different batches of the same drug hadstabile and repeatable fingerprint.
  
  
  CONCLUSIONS
  By using IR fingerprint, either Tongren Dahuoluo pills or Tongren Niuhuangqingxin pills can be exactly identified. It provides a rapid method for drug identification and quality control.
authors.affiliation: School of Pharmacy, Shandong University, Jinan 250012, China. jinguot@sdu.edu.cn
authors.forename: Jin-guo
authors.initials: JG
authors.lastname: Tian
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.forename: Jian
authors.initials: J
authors.lastname: Ren
authors.forename: Ai-ping
authors.initials: AP
authors.lastname: Hu
authors.forename: Yian-hui
authors.initials: YH
authors.lastname: Gao
authors.forename: Hong-xiang
authors.initials: HX
authors.lastname: Lou
mesh_terms: D004338:Drug Combinations; D004340:Drug Contamination / Q000517:prevention & control; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry; D011786:Quality Control; D013055:Spectrophotometry, Infrared
chemical_list: D004338:Drug Combinations; D004365:Drugs, Chinese Herbal