| Summary: | 碩士 === 中原大學 === 化學學系 === 82 === The essential oil was prepared from the leaves of Alpinia
speciosa (Wendl.)K.Schum by means of steam distillation and
solvent extraction. It was treated with base to remove the
acidic compounds and a neutral product was obtained. The neut-
ral essential oil was separated and purified by the combination
of column chromatography and GC/TCD ,and was identified by dir-
ect comparison of GC retention times, GC,GC/MS , IR and NMR. 26
terpenoids including, α-Pinene, β-Pinene, Camphene, Myrcene,
Limonene, 1,8-Cineole, γ-Terpinene, p-Cymene, d-Camphor,
Linalool, Terpinen-4-ol, α-Caryophyllene,Borneolα-Terpineol,
γ-Cadinene , δ-Cadinene, cis-Sabinol, 1,5-p-Menthadien-7-ol,
Dihydrocaryophyllene-5-one, Guaiol, Elemol, Thymol, α-Cadinol,
β-Eudesmol, Phytol and an antiulcer component-Dihydro-5,6-
dehydrokawain were identified.
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