天麻液相色谱指纹图谱研究

目的建立天麻的液相色谱指纹图谱,为科学评价及有效控制天麻质量提供新方法。方法采用HPLC法分析不同产地的18个天麻样品,确定指纹峰并进行对照药材相似度、共有模式相似度的计算,用纯品随行对照结合LC-MS对主要指纹峰进行定性鉴定。结果建立了由27个指纹峰和17个共有峰组成的天麻液相色谱指纹图谱,指纹峰具有特征性,鉴定了其中12个主要的指纹峰。用对照药材相似度,可将天麻样品分为3类安徽河南产天麻、陕西四川产天麻和云南产天麻。两个相关系数分界点为0.80和0.58,夹角余弦分界点为0.88和0.73。结论所选指纹峰有特征性,建立的指纹谱可用来区别3个产地的天麻药材,并为进一步控制天麻质量提供依据。

HPLC Fingerprint of Gastrodia elata

Objective To establish HPLC fingerprint for evaluating and controlling the quality of Gastrodia elata. Methods HPLC Analysis and similarity calculation were used for establishing fingerprint chromatogram and classifying 18 different original samples; LC-MS and pure compound comparisons were employed for the fingerprint peaks identification. Results HPLC Fingerprint chromatogram was cons- tructed with 27 fingerprint peaks, 17 of which were common fingerpring peaks and 12 main compounds were identified. According to the similarity to standardize herbal medicine, 18 samples could be classified three groups, Anhui-Henan, Shanxi-Sichuan, and Yunnan habitats. The two critical points were 0.80 and 0.58 for correlation coefficient and 0.88 and 0.73 for cosine values. Conclusion The selected fingerprint peaks are diagnostic for G. elata and the constituted HPLC fingerprint chromatogram could be used for identifying different habitats and served as a powerful tool for further quality control of G. elata.