用色谱-质谱方法鉴定薄荷油中的异构体

用毛细管气相色谱－质谱联用、程序升温方法分析了一种薄荷油的化学成分、共分离出20个组分，其中含4组异构体，它们分别是：m/z=136的5个成分α－蒎烯、β－蒎烯、β－月桂烯、α－菲兰烯和柠檬烯；m/z＝154的2个成分（cis)－薄荷酮和（2R－cis)－薄荷酮；m/z＝156的2个成分（1α.2α.5β）－薄荷醇和（1α.2β.5β）－薄荷醇；以及m/z＝204的8个成分（1α，3aα，3bβ，6aβ，6bα）－十氢－3a－甲基－6－亚甲基－1－异丙基－环丁烷并[1,2:3,4]二环戊烯、[1R-(1R,4E,9S)－4，11，11－三甲基－8亚甲基－双环（7．2．0）十一碳4－烯、[1R-(1aα，7α，7aα，7bα]-1a,2,3,5,6,7,7a,7b-八氢－1,1,7,7a-四甲基－1氢－环丙烷[α]并萘、[1aR-(1aα，4aα，7α，7aβ，7bα）－十氢，1，1，7－三甲基4－亚甲基－1－氢－环丙烷[e]并奥、（1S-exo）－2－甲基－3－亚甲基－2－（4－甲基－3－戊烯基）－二环（2．2．1）庚烷、（3aα，3bα，4α,7β，7aR）－八氢－7甲基－3亚甲基－4－异丙基－1氢－不戊烷[ 1,3]并环丙烷[1,2]并苯、1－乙烯基－1－甲基－2－异丙烯基－4（1－甲基亚乙基）环己烷和绿叶烯。

Identification of Isomer of Volatile Oils in Peppermint Leaves and Its Stalks by Gas Chromatography-Mass Spectrometry

The fine composition of volatile oils in a raw peppermint in July were analysed by combined means of programmed temperature capillary gas chromatography/mass spectrometry (GC/MS).20 compounds were separated and identified.The main constituents were (1α,2α,5β)-menthol (16.88%),(1α,2β,5β)-menthol (74.98%),cis-menthone(3.84%) and (2R-cis)-menthone (1.25%).In the whole July mint there were 4 groups of isomeric compound,their molecular formula were C10 H16 (5 components),C10 H18 O (2 components),C10 H20 O (2 components) and C15H24(8 components),respectively.