红景天药材的~1H-NMR指纹图谱研究

Study on 1H-NMR fingerprinting of Rhodiolae Crenulatae Radix et Rhizoma

建立红景天药材的核磁共振(1H-NMR)指纹图谱,为判别不同来源的药材及其质量提供依据。利用水峰抑制脉冲序列采集样品溶液的1H-NMR谱,测定温度298 K,观测频率400.13 MHz,NMR数据经分段积分处理后分别进行相似度法和主成分分析(PCA)法评价。相似度分析结果显示其中9批红景天药材的相关系数均在0.95以上;PCA法成功区分了10批不同来源的红景天药材,其中3批药材与标准药材差异较大,变量筛选结果进一步提示红景天苷、酪醇、马来酸和丙氨酸是鉴定红景天药材质量的主要差异性成分。结果提示PCA评价方法比相似度计算法的灵敏性更高,并且可提供具体的差异成分信息。1H-NMR指纹图谱结合PCA评价的方法为中药材的质量评价提供了一种新的辅助方法。

Nuclear magnetic resonance（1H-NMR） fingerprint of Rhodiola rosea medicinal materials was established, and used to distinguish the quality of raw materials from different sources. Pulse sequence for water peak inhibition was employed to acquire 1 H- NMR spectra with the temperature at 298 K and spectrometer frequency of 400. 13 MHz. Through subsection integral method, the ob- tained NMR data was subjected to similarity analysis and principal component analysis （PCA）. 10 batches raw materials of Rhodiola rosea from different origins were successfully distinguished by PCA. The statistical results indicated that rhodiola glucoside, butyl alco- hol, maleic acid and alanine were the main differential ingredients. This method provides an auxiliary method of Chinese quality ap- proach to evaluate the quality of Rhodiola crenulata without using natural reference substances.