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首页> 外文期刊>Journal of Agricultural and Food Chemistry >ON THE GENUINENESS OF CITRUS ESSENTIAL OILS .51. OXYGEN HETEROCYCLIC COMPOUNDS OF BITTER ORANGE OIL (CITRUS AURANTIUM L)
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ON THE GENUINENESS OF CITRUS ESSENTIAL OILS .51. OXYGEN HETEROCYCLIC COMPOUNDS OF BITTER ORANGE OIL (CITRUS AURANTIUM L)

机译：关于柑橘精油的遗传学.51。苦橙油（柑桔L）的氧杂环化合物

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摘要

The composition of the oxygen heterocyclic fraction of bitter orange essential oil, obtained by normal-phase HPLC with two on-line coupled columns (mu-Porasil and Zorbax), is reported. Genuine, industrial, cold-pressed Italian and Spanish essential oils, commercial oils, laboratory hand-extracted oils, and mixtures of bitter orange oil with sweet orange, lemon, lime, and grapefruit oils were analyzed. Four coumarins (osthol, meranzin, isomeranzin, and meranzin hydrate), three psoralens (bergapten, epoxybergamottin, and epoxybergamottin hydrate), and four polymethoxyflavones (tangeretin, 3,3',4',5,6,7,8-heptamethoxyflavone, nobiletin, and tetra-O-methylscutellarein) were identified. In addition, three unknown coumarins were found. Meranzin was the main component isolated. Meranzin hydrate, the formation of which was probably due to the hydration of meranzin during the industrial extraction, was not found in the laboratory hand-extracted samples. Meranzin was not present in some industrial samples, probably because of a prolonged and unusual contact of the essential oil with an acid aqueous medium during the process of extraction. Italian essential oils usually exhibited a higher content of oxygen heterocyclic compounds than the Spanish oils. The bitter orange oils adulterated by sweet orange oil were characterized by a lower content of almost all the aforementioned components; the adulteration of bitter orange oils with lemon, lime, or grapefruit oils was detected by the presence of components peculiar to added oils.
机译：报告了苦橙香精油中氧杂环部分的组成，该组分是通过具有两个在线耦合柱（mu-Porasil和Zorbax）的正相HPLC获得的。分析了真正的，工业的，冷榨的意大利和西班牙精油，商业用油，实验室手工提取的油以及苦橙油与甜橙，柠檬，酸橙和葡萄柚油的混合物。四种香豆素（水合薄荷醇，黑素，异麦芽酮和水合黑素），三个补骨脂素（bergapten，环氧伯加莫汀和环氧伯甘酸水合物）和四个聚甲氧基黄酮（橘子，3,3'，4'，5、6、7、8-七甲氧基黄酮，鉴定了诺比列汀和四-O-甲基黄cut苷。另外，发现了三个未知的香豆素。梅兰津是分离的主要成分。在实验室手工提取的样品中未发现水红素水合物，其形成可能是由于在工业萃取过程中水合了黑色素。在某些工业样品中不存在Meranzin，这可能是由于萃取过程中精油与酸性水性介质长时间不寻常地接触所致。意大利精油通常显示出比西班牙油更高的氧杂环化合物含量。掺入甜橙油的苦橙油的特征在于，几乎所有上述组分的含量都较低。通过添加的油脂特有的成分检测出苦橙油与柠檬，酸橙或葡萄柚油的掺假。

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