Analysis of volatile compounds in Cyclocarya paliurus leaves by SPME-GC-MS

Solid- phase microextraction( SPME) coupled to gas chromatography- triple quadrupole mass( SS- #- S)spectrometry( GC- QQQ- MS) was used for the analysis of volatile components in wild( Xiushui,Jiangxi) and cultivated( Wencheng,Zhejiang) Cyclocarya paliurus leaves.Then comparison of volatile components and contents between groups was made.Results showed that a total of 91 volatile constituents were identified in the Cyclocarya paliurus leaves from two regions,of which 45 volatile compounds were shared in both groups. Meanwhile,it revealed that these 91 components mainly belonged to hydrocarbons,alcohols,aldehydes,esters,ketones,ethers and naphthalenes.However,there were certain differences in the specific composition and content of these volatile components in two groups. For example,the major volatile compounds of wild Cyclocarya paliurus leaves wereβ- selinene( 18.52%),caryophyllene( 8.11%),β- bisabolene( 6.01%),β- elemene( 5.36%),cis- geranylacetone( 4.02%),etc,while the major volatile compounds of cultivated Cyclocarya paliurus leaves were β- bourbonene( 11.05%),β-selinene( 10.91%),caryophyllene( 7.03%),benzyl alcohol( 7.01%),2,6-dimethyl-6-( 4-methyl-3-pentenyl)- bicyclo3.1.1hept-2- ene( 5.36%),2,6,11- trimethyldodecane( 5.16%),etc.