Liquid Chromatography/Mass Spectrometry and Liquid Chromatography/Nuclear Magnetic Resonance as Complementary Analytical Techniques for Unambiguous Identification of Polymethoxylated Flavones in Resid

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• 作者：Berthold Weber ; Beate Hartmann ; Detlef St&ouml ; ckigt ; Klaus Schreiber ; Michael Roloff ; Heinz-Jü ; rgen Bertram ; and Claus O. Schmidt
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2006
• 出版时间：January 25, 2006
• 年：2006
• 卷：54
• 期：2
• 页码：274 - 278
• 全文大小：76K
• 年卷期：v.54,no.2(January 25, 2006)
• ISSN：1520-5118

文摘

Liquid chromatography/mass spectrometry and liquid chromatography/nuclear magnetic resonancetechniques with ultraviolet/diode array detection were used as complementary analytical tools for thereliable identification of polymethoxylated flavones in residues from molecular distillation of cold-pressed peel oils of Citrus sinensis. After development of a liquid chromatographic separationprocedure, the presence of several polymethoxy flavones such as sinensetin, nobiletin, tangeretin,quercetogetin, heptamethoxyflavone, and other derivatives was unambiguously confirmed. In addition,proceranone, an acetylated tetranortriterpenoid with limonoid structure, was identified for the firsttime in citrus.Keywords: LC/NMR; LC/MS; Citrus sinensis; polymethoxylated flavones; polymethoxyflavones;tetranortriterpene; limonoid; proceranone