Analysis on the Volatile Constituent of Eucalyptus Leaves from Guangxi
The volatile oil from the fresh leaves of Eucalyptus pellita,Eucalyptus urophylla×E.grandis and Eucalyptus cloeziana were extracted by steam distillation,and the main components of the volatile oil were analyzed by GC-MS.It was shown that the yield of volatile oil from the fresh leaves of Eucalyptus pellita,Eucalyptus urophylla x E.grandis and Eucalyptus cloeziana was 0.19％,0.44％and 0.35％,respectively.The main compounds of volatile oil from Eucalyptus pellita wereα-terpineol(25.226 1％),DL-isobomeol(11.433 7％),α-pinene(11.034 9％),(-)-trans-pinocarveol(8.711 1％),fenchol(6.041 3％),limonene(5.017 8％),(-)-myrtenol(4.531 9％),β-caryophyllene(3.246 2％),β-pinene(3.001 3％)and pinocarvone(1.846 7％).The main compounds of volatile oil from Eucalyptus urophylla x E.grandiswere 1,8-cineole(38.372 3％),α-pinene(17.975 4％),α-terpineol(7.984 3％),terpinyl acetate(5.091 4％),DL-isoborneol(4.526 5％),(-)-trans-pinocarveol(2.092 7％)and camphene(1.224 1％).The main compounds of volatile oil from Eucalyptus cloeziana were α-terpineol(41.676 3％),β-pinene(6.785 4％),α-pinene(6.081 8％),isophytol(5.520 1％),benzoic acid(4.515 2％),longicyclene(2.787 2％),spathulenol(2.405 3％),γ-eudesmol(2.447 7％),gualol(2.408 3％),β-elemene(1.893 3％),isocaryophyllene(1.605 4％),3,7,11,15-tetramethylhexadecan-l-ol(1.747 4％)and anethole(1.317 4％).It was obviously shown that the composition of volatile oil varied greatly with different varieties of eucalyptus.
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