Choi Hyang-Sook, Sawamura Masayoshi
Department of Food and Nutrition, Faculty of Natural Science, Duksung Women's University, Tobong-Gu, Seoul, Korea.
Biosci Biotechnol Biochem. 2002 Feb;66(2):439-43. doi: 10.1271/bbb.66.439.
Compositional changes of Citrus tamurana Hort. ex Tanaka (hyuganatsu) essential oil were analyzed after storage for 1, 3, 6, and 9 weeks at -21, 5, 20, and 30 degrees C. 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 30 degrees C. However, the contents of myrcene, gamma-terpinene, and terpinolene decreased, while there was a considerable increase in p-cymene. Among the sesquiterpene hydrocarbons, considerable increases in the (-)-cedrene, gamma-elemene, and alpha-humullene contents were noted in samples stored at 30 degrees C, and the trans-beta-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 gamma-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.
对田中东柑（日向夏橙）精油在-21℃、5℃、20℃和30℃下储存1、3、6和9周后的成分变化进行了分析。氧化物总量大幅增加。单萜醇和酮的含量也有所增加。在30℃以下，单萜烃总量保持不变。然而，月桂烯、γ-萜品烯和萜品油烯的含量下降，而对伞花烃的含量则显著增加。在倍半萜烃中，在30℃储存的样品中，（-）-雪松烯、γ-榄香烯和α-葎草烯的含量显著增加，而反式-β-法呢烯的含量在储存期间下降。单萜醇的总含量略有增加。反式香芹醇的含量在储存期间增加。对伞花烃、反式香芹醇、异薄荷酮和氧化柠檬烯的含量增加，而γ-萜品烯、萜品油烯和香茅醛的含量在储存期间显著下降。这些化合物在储存期间的变化可作为日向夏橙精油的质量指标。
