李军山 高晗 张浩



【摘 要】 目的:建立气相离子迁移谱(GC-IMS)结合化学计量法快速鉴别连翘的产地的方法。方法:采用GC-IMS法测定15批连翘药材中挥发性成分,运用主成分分析、聚类分析不同产地连翘。结果:以α-蒎烯的量为标准,进行聚类分析与主成分分析,可将不同连翘产地区分为3大类。判别分析进一步以Fisher 判别函数的形式将陕西、山东、河南产地较准确进行区分。结论:GC-IMS结合化学计量法可快速、准确鉴别连翘产地,研究结果也可为不同产地连翘的质量评价提供科学的依据。
【关键词】 连翘;α-蒎烯;气相离子迁移谱;聚类分析;主成分分析;产地
【中图分类号】R284.1 【文献标志码】 A 【文章编号】1007-8517(2021)12-0047-04
Abstract:Objective To establish a method for rapid identification of forsythia by gas phase ion migration spectrum (GC-IMS) combined with stoichiometry. Methods GC-IMS method was used to determine the volatile components in 15 batches of forsythia,and principal component analysis and cluster analysis were used to analyze the volatile components in forsythia from different areas. Results By using the amount of alpha-pinene as the standard,cluster analysis and principal component analysis were applied.The samples can be divided into three categories. Discriminant analysis further distinguished the producing areas of Inner Shanxi,Shandong and Henan accurately by using Fisher discriminant function.Conclusion GC-IMS combined with stoichiometry can quickly and accurately identify the producing areas of forsythia,and the research results can also provide scientific basis for the quality evaluation of different producing areas of forsythia.
Keywords:Forsythia; Alpha Pinene; GC-IMS; Cluster Analysis; Principal Component Analysis; Origin
连翘为木犀科植物连翘Forsythia suspensa(Thunb.) Vahl的干燥果实。秋季果实初熟尚带绿色时采收,除去杂质,蒸熟,晒干,习称“青翘”;具有清热解毒、消肿散结、疏散风热等功效。连翘含有苯乙醇苷类、木脂素类、萜类与黄酮类等多种化学成分[1-2]。研究表明连翘具有多种药理作用,如抗菌作用、抗病毒作用、抗炎作用和保肝作用等。
连翘主生于山坡灌丛、林下或草丛中,海拔250~2200 m。国内除华南地区外其他各地均有少量栽培,以山西、陕西、河南产量最多。从主产区资源和历史收购情况来看,山西省约占全国的40%,河南占30%,陕西占20%左右,其余主要分布于湖南、湖北、宁夏、甘肃、河北、山东、辽宁等省。鉴于此,本研究收集陕西、山东、山西、河南4个省份的连翘(青翘)药材15 批,以连翘中α-蒎烯作为指标成分,采用GC-IMS(The Gas Chromatograph-Ion Mobility Spectrometer)法测定,比较研究聚类分析法、主成分分析法在连翘产地鉴别上的应用。……