Effects of storage conditions on the composition of Citrus tamurana Hort. ex Tanaka (hyuganatsu) essential oil
Choi, H.S. (Duksung Women's Univ., Seoul (Korea R.)) | Sawamura, M.
Compositional changes of Citrus tamurana Hort. Ex Tanaka (hyuganatsii) essential oil were analyzed after storage for 1, 3,6, and 9 weeks at - 21,5, 20, and 30degC. The total amount of oxides increased greatly. The contents of monoterpene alcohols and ketones also increased. The total amount of monoterpene hydrocarbons was unchanged up to 30degC. However, the contents of myrcene, g-terpinene, and terpinolene decreased, while there was a considerable increase in p-cymene. Among the sesquiterpene hydrocarbons, considerable increases in the (-)-cedrene, g-elemene, and a-humullene contents were noted in samples stored at 30degC, and the trans-b-farnesene content decreased during storage. The total content of monoterpene alcohols was increased slightly. The content of trans-carveol increased during storage. p-Cymene, trans-carveol, isopiperitone, and limonene oxide contents increased, while g-terpinene, terpinolene, and citronellal contents decreased significantly during storage. The changes of these compounds during storage can serve as a quality index for hyuganatsu essential oil.
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