OBJECTIVETo identify Tongren Dahuoluo pills and Tongren Niuhuangqingxin pills respectively by analysis of IR fingerprint.

METHODBoth drugs were extracted with hexane, ethylether and butanone respectively and then the obtained extracts were measured with the ET-IR spectrometer.

RESULTBy 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.

CONCLUSIONBy 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.

Drug Combinations ; Drug Contamination ; prevention & control ; Drugs, Chinese Herbal ; administration & dosage ; chemistry ; Plants, Medicinal ; chemistry ; Quality Control ; Spectrophotometry, Infrared