基于HPLC的秦艽药材特征指纹图谱构建及主成分分析
李霞 , 何志鹏 , 王仕宝 , 陈垣 , 张慧 , 房宇 , 杨洁
甘肃农业大学学报 ›› 2023, Vol. 58 ›› Issue (03) : 115 -124.
基于HPLC的秦艽药材特征指纹图谱构建及主成分分析
Construction of characteristic fingerprinting and principal component analysis of Gentianae macrophyllae based on HPLC
目的 HPLC测定23批秦艽样品中3种环烯醚萜苷含量,并结合中药指纹图谱进行相似度评价,同时探究主成分分析。 方法 以收集7个不同产区和4个不同基原的秦艽药材,采用HPLC测定样品中马钱苷酸、獐牙菜苦苷和龙胆苦苷的含量。色谱条件为C18色谱柱(4.6 mm×250 mm,5 μm),流动相为乙腈-0.2%醋酸(9∶91),检测波长254 nm,流速1.0 mL/min,柱温25 ℃,进样量为10 μL。另外,结合中药指纹图谱软件进行相似度评价;同时利用10个共有色谱峰的峰面积组成的数据矩阵进行主成分分析。 结果 23批不同产地及不同基原的秦艽、粗茎秦艽、麻花秦艽和小秦艽,马钱苷酸、獐牙菜苦苷和龙胆苦苷含量分别在0.112%~2.390%,0.079%~2.038%,0.426%~17.314%。马钱苷酸、獐牙菜苦苷和龙胆苦苷三者总含量在0.7146%~19.969%。该试验精密度、稳定性和重复性试验的RSD均≤3.0%,马钱苷酸、獐牙菜苦苷和龙胆苦苷加标平均回收率分别为:97.56%,100.06%,102.12%(RSD<1.0%,n=6)。另外,所有秦艽样品与共有模式下的对照指纹图谱其相似度在0.990~0.999,各批样品相似度较好。最后,根据共有色谱峰的峰面积组成的数据矩阵进行主成分分析,其结果表明,秦艽的2个主成分(PC1和PC2)分别表征了原始变量49.5%和 22.2%的变异信息。 结论 所构建的HPLC检测方法,可用于秦艽药材的含量测定;同时因产地或基原不同,样品中马钱苷酸、獐牙菜苦苷和龙胆苦苷三种成分含量存在一定差异,但三者的谱峰的分离度和响应值较高且为共有峰,因此可确定为秦艽药材指纹特征图谱和主成分分析。
Objective The study aimed to determine the contents of three iridoid glycosides in 23 batches of Gentianae Macrophyllae Radix samples by using HPLC and to evaluate the similarity of these samples by using Traditional Chinese Medicine Fingerprint (TCMF) and principal components analysis. Method Samples were collected from 7 different production areas and 4 different origins,and the contents of loganic acid,swertiamarin,and gentiopicroside were determined using HPLC with a C18 column (4.6 mm×250 mm,5 μm) and a mobile phase of acetonitrile -0.2% acetic acid (9∶91).The detection wavelength was 254 nm, flow rate was 1.0 mL/min, column temperature was 25 °C,and injection volume was 10 μl.Traditional Chinese medicine fingerprint software was used to evaluate the similarity,and the data matrix consisting of the peak areas of 10 common chromatographic peaks was used for principal component analysis. Result The results showed that the contents of loganic acid,swertiamarin,and gentiopicroside varied among the 23 batches of Gentiana macrophylla Pall.,G.crassicaulis Duthie ex Burk.,G.straminea Maxim.and G.dahurica Fisch.from different origins and regions,with total contents ranging from 0.714 6% to 19.969%.The RSD of precision,stability,and repeatability of the tests were ≤3.0%,and the average recoveries of loganic acid,swertiamarin,and gentiopicroside were 97.56%,100.06%,and 102.12% (RSD<1.0%,n=6).The similarity of fingerprints between all G.Macrophyllae Radix samples and the control fingerprints under the common mode was 0.990~0.999,indicating good similarity among all batches.Principal component analysis was used to analyze the data matrix consisting of the peak areas of common chromatographic peaks,and the results showed that the two principal components (PC1 and PC2) of G.Macrophyllae Radix reflected the variation information of 49.5% and 22.2% of the original variables. Conclusion In conclusion,the HPLC detection method established in this study can be used for the determination of medicine contents in G.Macrophyllae.The contents of loganic acid,swertiamarin,and gentiopicroside varied to some extent among samples from different origins or regions,but the resolution and response values of the three peaks were relatively high and they were common peaks,making them suitable as fingerprints for G.Macrophyllae.Principal component analysis can provide useful information on the variation among different batches.
HPLC / 秦艽 / 指纹图谱 / 主成分分析(PCA)
HPLC / Gentianae macrophyllae Radix / fingerprint / principal component analysis (PCA)
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