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[Studies on X-ray diffraction pattern of traditional Chinese medicinal materials].

Authors Lu, Y; Zheng, Q T; Wu, N; Wang, G L; Tian, J G; Zhang, J; Chen, D C

Journal Yao xue xue bao = Acta pharmaceutica Sinica , 1997,3:32

PubMed 11327020

Abstract Traditional Chinese medicine(TCM) as prescribed by Chinese traditional physicians is usually available as decoction slices which calls for a ready method for assessment of quantity or even genuineness. Three groups of TCM drugs (radix Rubiae, bulbus Fritillariae and rhizoma Dioscoreae) were selected by using powder X-ray diffraction analysis with complete absorption profile. Topological regularity and characteristic peaks of the absorption profile were obtained as fingerprint in X-ray diffraction diagrams of the pertinent medicinal materials. We have discovered the similarities of 3 radix Rubiae samples gathered from different localities and their differences with Rubia tinctorum, the similarities and differences between 7 species belonging to Fritillaria Genus, the similarities of 2 rhizoma Dioscoreae samples from different localities and their differences with 2 counterfeits. The result points to a promising prospect in achieving an objective assessment of genuineness at TCM drugs.

Species covered 茜草属 Rubia 贝母属 Fritillaria