Molecular Distillation Separation and Composition Analysis of Essential Oil from Shatian Pomelo Peel
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Abstract:
In order to compare the components of Shatian pomelo peel essential oil by different methods, essential oil of Shatian pomelo peels were extracted by cold grinding method and steam distillation, respectively. Further, molecular distillation equipment was used to separate the essential oils into light and heavy components. Gas chromatography-mass spectrometry (GC-MS) was used to analyze the composition and structure of essential oils and its components, and the finger-prints of essential oil of cold grinding oil and steam distillation oil of pomelo peel were obtained. The results showed that there were 33 kinds of volatile components, mainly for alkenes, alcohols, esters, aldehydes and ketones. There were significant differences on volatile components between the cold grinding oil and steam distillation oil, and the common components were 14 kinds. Cold grinding method were more able to keep the aroma components of the original than steam distillation method. After separation by molecular distillation, the fractions, quantities and relative contents of fractions at different levels were significantly different. The content of olefins in the light fractions was more than 99%, indicating that the molecular distillation could effectively purify Shatian pomelo essential oil and could be used for comprehensive processing and utilization of pomelo essential oil.
