【摘要】 目的:建立绞股蓝药材的HPLC指纹图谱,采用分形理论与小波变换的方法进行指纹图谱的特征提取,利用相似度计算对绞股蓝药材进行质量评价。方法:用甲醇回流提取绞股蓝药材中的黄酮类成分,建立HPLC指纹图谱。将色谱响应信号进行小波分解,并用分形维数描述各小波基参量。以小波基分形参量为特征变量,对不同产地的绞股蓝药材进行相似度比较。结果:采用优化的提取与分析条件建立了绞股蓝药材的指纹图谱。各样品相对于参照品的相似度可有效的评价各种绞股蓝样品。结论:以小波基分形参量表达的色谱指纹图谱用于中药材的质量评价,相对于人工选择特征峰更具客观性。以小波基分形参量计算的相似度可以定性评价绞股蓝样品;浙江产绞股蓝药材可以作为陕西安康绞股蓝的替代药材。更多还原

【Abstract】 AIM:To develop the HPLC fingerprinting of Gynostemma pentaphyllum and evaluate the quality of different sources of G.pentaphyllum by fractal expression and wavelet analysis based on similarity calculation.METHODS:Flavones of G.pentaphyllum were extracted by using methanol and the HPLC fingerprint analysis on an HPLC/DAD system was developed.The signal of chromatogram was decomposed into components at different resolution by wavelet transform.Furthermore,the fractal dimensions of these components were computed for similarity calculation.RESULTS:With the optimized extraction and analytic tool,the fingerprint of G.pentaphyllum was developed.The similarity was effective in evaluating the quality of G.pentaphyllum.CONCLUSION:To describe a fingerprint profile by factors based on fractal and wavelet transform was a more objective method.G.pentaphyllum from Zhejiang province can be used as a substituent for raw drug from Ankang,Shanxi province.更多还原