基于UFLC-IT-TOF/MS技术分析不同产地黄芪的化学成分

为研究不同产地黄芪的化学成分差异，制备了甘肃和内蒙古2个产地共15批黄芪药材的水煎液，利用超快速液相色谱-离子阱飞行时间质谱仪(UFLC-IT-TOF/MS)采集15批黄芪药材水煎液化学成分的指纹图谱，进而运用偏最小二乘-判别分析(PLS-DA)和(非)参数检验对数据进行模式识别和统计分析，以变量投影重要性大于1、统计学差异小于0.05以及倍数变化大于1.5为阈值，筛选并鉴定其差异成分。结果发现，不同产地的黄芪水煎液中毛蕊异黄酮、芒柄花素、亚油酸等7个化学成分的含量有明显差异，涉及木脂素、黄酮、脂肪酸等4种类别。本研究为黄芪药材的全面质量控制、准确区分产地以及合理种植栽培提供了重要依据。

Analysis of the differential compounds in Astragalus membranaceus from different geographical origins by UFLC-IT-TOF/MS

To uncover the differences in material basis of Astragalus membranaceus from different origins, ultra-fast liquid chromatography-ion trap time-of-flight mass spectrometry(UFLC-IT-TOF/MS)was applied to characterize chemical features of 15 batches of water decoction of Astragalus membranaceus from Gansu Province and Inner Mongolia Autonomous Region. Pattern recognition and statistical analysis were performed using partial least squares-discriminant analysis(PLS-DA)and(non)parametric tests, respectively. The differential compounds with variable importance in projection(VIP)> 1, adjusted P< 0. 05, and fold change(FC)> 1. 5 were screened out and further identified. It was found that 7 different substances such as calycosin, formononetin and linoleic acid could be used as quality markers to distinguish the origin of Astragalus membranaceus. Our findings provided new potential quality markers for the accurate differentiation of geographical origins of Astragalus membranaceus as well as its comprehensive quality control.