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《Journal of Forestry Engineering》 2018-01
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Analysis on components of high content o-cymene from Cinnamomum camphora essential oil

YANG Suhua;LU Shunzhong;QIU Mi;LUO Yufen;Guangxi Academy of Forestry;  
Camphor tree( Cinnamomum camphora) is used to prepare materials,oil,medicine,spices,etc. The essential oils are rich in eucalyptol,linalool,terpineol,bornanone,endo-borneol,isonerolidol and other compounds.According to the types and contents of the main components in leaves,essential oils can be subdivided into five types:linalool,cineol,camphor,endo-borneol and isonerolidol. In this paper,we selected C. camphora from Zhuang Autonomous Region of Guangxi as the research object. Essential oils were extracted from leaves and branches by steam distillation,and the oil contents were measured. The essential oils were determined by gas chromatograph and gas chromatograph-mass. The results showed that the average yield of oils from branches and leaves were 0. 28% and 0.67%,respectively,and 39 chemical components with relative contents ≥0. 27% were identified,19 of which were components common in branches and leaves. The major components were α-pinene,myrcene,α-phellandrene,o-cymene,linalool,endo-borneol,4-carvomenthenol,α-terpineol,nerolidol,caryophyllene oxide,humulene oxide etc.Eleven components in branch essential oil and nine components in leaf essential oil were found with relative content higher than 2%. They account for 78.35% and 83.45% of the total essential oil,respectively. The top three components in terms of relative content for branches and leaves were eucalyptol,o-cymene,α-terpineol and o-cymene,β-chamigrene,carvacrol,respectively,and their relative contents were 24.69%,19.94%,7.68% and 41.97%,11.40%and 7.23%,respectively. The main component of branch essential oil was eucalyptol,and its content was 24.69%;the main component in the leaf essential oil was o-cymene,and its content was 41.97%. The essential oil in the leaves contained high content of o-cymene,therefore,the composition analysis of essential oil has reference value for the exploitation and cultivation of C. camphora.
【Fund】: 广西林业科技项目(桂林科字[2016]第6号);; 广西科学技术厅自治区主席科技资金项目(1517-06);; 广西林科院基本科研业务费专项(林科201618号)
【CateGory Index】: TQ651.2
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