不同产地大马士革玫瑰精油特征成分的气相离子迁移谱对比分析

目的分析平阴产大马士革玫瑰精油与保加利亚产大马士革玫瑰精油挥发性香成分,确定2者的特征性成分。方法利用气相离子迁移谱(gas chromatography-ion mobility spectroscopy,GC-IMS)分析技术对不同产地玫瑰精油进行对比分析。结果两种不同玫瑰精油样品经GC-IMS技术分析可定性出,挥发性物质为54种单体及部分物质的二聚体,单体主要包括醇类、酯、酮类、醛类、烯烃类、酸类以及醚类。2个品种的玫瑰精油所含挥发性香成分在种类及含量上存在差异,且每种玫瑰品种精油都有其区别于其他品种的特征性指纹风味化合物。其中1,8-桉叶素(二聚物)、羟基丙酮、2,3-丁二醇、糠醛(二聚物)、3-戊酮、α-松油醇、1-丙醇、玫瑰醚、戊醛、α-苯甲醇、E,E-2,4-庚二烯醛、反-2-己烯醇、己醛、乳酸乙酯、2-苯乙醇、乙醛缩二乙醇等成分的有无及含量高低可作为区分DMSGI与DMSGII的参考依据。结论通过GC-IMS分析技术,可确定区分平阴产大马士革玫瑰精油与保加利亚产大马士革玫瑰精油的特征挥发性成分,可作为鉴别2者的依据。

Gas chromatography-ion mobility spectroscopy comparative analysis of characteristic components of rose essential oil from Damascene cultivated in different areas

Objective By analyzing the volatile constituents of essential oil from Rose damascene cultivated in Pingyin and Bulgaria, the characteristic constituents were determined. Methods Gas chromatography-ion mobility spectroscopy (GC-IMS) was used to detect their flavor compounds. Results The diversities between different products were explored according to the characteristic flavor fingerprints of volatile components and principal component analysis. The results in this paper showed that 54 volatile compounds were identified including some dimers of flavor compounds. These volatile compounds mainly consisted of alcohols, esters, ketones, aldehydes, olefins, acid, and ethers. There are differences in the types and contents of volatile aroma components in rose essential oil of two varieties, and each rose essential oil has its characteristic fingerprint flavor compounds which are different from other varieties. Among them, the content of 16 characteristic substances from DMSGI and DMSGII can be used as the reference for distinguishing, such as1.8-Cineole (dimer), 1-Hydroxy-2-propanone, 2,3-Butanediol, Furfural(dimer), 3-Pentanone, alpha-Terpineol, 1-Propanol, Rose oxide, 1-propanol, alpha-Methyl benzenemethanol, (E, E)-2,4-heptadienal, 2-Hexen-1-ol, Hexanal, Ethyl lactate, 2-Phenylethanol, 1,1-diethoxyethane, etc. Conclusion Under certain conditions, GC-IMS analysis technique can be used to distinguish different rose essential oils.