论文部分内容阅读
Objective To analyze the chemical components of volatile oils in E.grandis × E.urophylla leaves at different growth years,and to discuss the effects of growth years on the chemical components of volatile oils in E.grandis × E.urophylla leaves at different growth years.Methods The volatile components was extracted from the E.grandis × E.urophylla leaves by steam distillation method,which were planted in the years 2006,2007,2008,2009 and 2010.And their chemical components were identified by GC-MS.Results The yields of volatile oils in E.grandis × E.urophylla leaves at different growth years were between 0.55% and 1.35%; and the yields enhanced with the increase of growth years.A total of 63 chemical compounds were identified by GC-MS,accounting for 93.00%-97.07% of the total volatile oils.Among them,chemical compounds with high relative contents were 1,8-eucalyptol (55.72%-63.47%),α-terpineol (9.78%-14.15%),α-terpinyl acetate (4.96%-7.06%),α-pinene (0.99%-4.31%) and borneol (2.40%-4.89%).Conclusions There were certain differences in the relative contents of volatile components in E.grandis × E.urophylla leaves at different growth years.
Objective To analyze the chemical components of volatile oils in E.grandis × E.urophylla leaves at different growth years, and to discuss the effects of growth years on the chemical components of volatile oils in E.grandis × E.urophylla leaves at different growth years. Methods The volatile components were extracted from the E.grandis × E.urophylla leaves by steam distillation method, which were planted in the years 2006, 2007, 2008, 2009 and 2010. And their chemical components were identified by GC-MS. Results The yield of volatile oils in E.grandis × E.urophylla leaves at different growth years were between 0.55% and 1.35%; and the yields enhanced with the increase of growth years. A total of 63 chemical compounds were identified by GC-MS , accounting for 93.00% -97.07% of the total volatile oils. Amm them, chemical compounds with high relative contents were 1,8- eucalyptol (55.72% -63.47%), α-terpineol terpinyl acetate (4.96% -7.06%), α-pinene (0.99% -4.31%) and borneol (2.40% -4.89%). Conclusions There were certain differences in the relative contents of volatile components in E. grandis × E.urophylla leaves at different growth years.