GC-MS和化学计量学解析法分析白术中挥发油成分

目的分析白术挥发油中的化学成分。方法采用气相色谱-质谱（GC-MS）联用技术对其进行分离检测,利用化学计量学解析法（CRM）对重叠色谱峰进行分辨解析,并结合程序升温保留指数辅助定性,从而对挥发油成分进行准确的定性定量分析。结果共分辨出了33个色谱峰,鉴定了其中29个组分,占白术挥发油总量的95.93%,其中主要化学成分为2-（2-甲氧基）苯甲氧基苯酚、γ-芹子烯和3,7（11）-蛇床二烯等,它们占总挥发油的70.07%,而其他26个组分只占25.86%。结论结合使用CRM解析重叠色谱峰,比单独使用GC-MS能更真实、全面地反映白术中的挥发油化学成分。

Analysis of Essential Oil in Rhizoma Atractylodes Macrocephala by GC-MS and Chemometric Resolution Method

OBJECTIVE To analyze the essential oil components in Rhizoma Atractylodes Macrocephala.METHODS Gas chromatography-mass spectrometry（GC-MS） combined with chemometric resolution method（CRM）,a useful chemometric resolution method which can be used to resolve overlapping peaks in chromatogram,together with the temperature-programmed retention index for assistant identification,was employed to qualitative and quantitative analysis of the essential oil components.RESULTS A total of 33 chromatographic peaks were resolved,and 29 components in the essential oils were identified,which accounted for 95.93% of the total relative contents.The main chemical compositions in the studied sample were 2-（2-methoxyphenoxy）phenol,γ-selinene and 3,7（11）-selinadiene,etc.All of these volatile alcohols accounted for about 70.07% of the total essential oils,and the other 26 constituents only accounted for about 25.86% of the total contents.CONCLUSION It could more really and comprehensively reflect the essential oil components in Rhizoma Atractylodes Macrocepha by GC-MS combined with CRM method,which can be used to resolve the overlapping chromatographic peaks than just used the GC-MS.