Comparative study on HPLC specific chromatogram of Oldenlandia corymbosa Linn. and Oldenlan diadiffusa(Willd.) Roxb / 中国药学杂志

ABSTRACT

OBJECTIVE: To establish the HPLC specific chromatogram of Oldenlandia corymbosa Linn. and Oldenlan diadiffusa (Willd.) Roxb. in different regions so as to distinguish these two traditional Chinese medicinal materials. METHODS: HPLC was performed on an Agilent Eclipse XDB-C18(4.6 mm×250 mm,5 μm) column with mobile phase consisting of methanol-water at a flow rate of 1 mL·min-1, column temperature at 30℃ and detection wavelength at 254 nm. Similarity evaluation system for chromatographic fingerprint of TCM was used to conduct similarity evaluation and Matlab7.0 software was used for principal component and cluster analysis. RESULTS: Oldenlandia corymbosa Linn. and Oldenlan diadiffusa (Willd.) Roxb. had eight common peaks, namely, a-h; the characteristic peaks of O. corymbosa were 7 to 12, while the characteristic peaks of O. diffusa were 1 to 6. The similarity values of O. corymbosa and O. diffusa collected from different sources were 0.733-0.984 and 0.873-0.951, respectively. According to the principal components analysis and cluster analysis, the tested samples were classified into three categories O. corymbosa collected from wild, O. diffusa collected from wild and purchased O. diffusa. CONCLUSION: The established method is reliable and rapid to distinguish the two kinds of easily confused traditional Chinese medicinal materials and also can offer reference for their quality control and clinical use.