@article{oai:u-ryukyu.repo.nii.ac.jp:02006831,
 author = {外間, 宏三 and Hokama, Kozo},
 issue = {8},
 journal = {琉球大学文理学部紀要 理学篇},
 month = {Jun},
 note = {The essential oil(285.5g)obtained by steam distillation of leaves of Alpinia speciosa K.Schum (so called Getto,697.4kg)was freed from fatty acid and phenols by washing with 3% sodium hydroxide and water.The oil was then successively evaporated off after drying over sodium sulfate,yielding a neutral material(253.7g).\nThis substance was divided by fractional distillation into 13 parts.These fractions were gas chromatographed and investigated by IR spectroscopy.After the result,the\nnext facts were known:1.The monoterpenoids,such as α-pinene.β-pinene,camphene,limonene,p-cymene,and　camphor,were　identified,and　their　contents　being　7.8%,2.2%,3.8%.4.8%,\n6.02% and 2.4％,respectively.2.A paper reported that the contents of camphor and campbene were 30% and 17%,respectively.The contents of them were,however,known to be 2.4% and 3.8%,respectively,by the gas chromatograph., 紀要論文},
 pages = {65--76},
 title = {月桃の葉の精油成分について},
 year = {1965}
}