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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >CHARACTERIZATION OF PHENOLIC AND SECOIRIDOID AGLYCONS PRESENT IN VIRGIN OLIVE OIL BY GAS CHROMATOGRAPHY CHEMICAL IONIZATION MASS SPECTROMETRY
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CHARACTERIZATION OF PHENOLIC AND SECOIRIDOID AGLYCONS PRESENT IN VIRGIN OLIVE OIL BY GAS CHROMATOGRAPHY CHEMICAL IONIZATION MASS SPECTROMETRY

机译:气相色谱-化学电离质谱法表征初榨橄榄油中酚和类油甾醇的存在

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摘要

Olive oil phenolic and secoiridoid compound derivatives were detected by mass spectrometry, Chemical ionization (CI) allowed us to obtain parent ions, that were not detectable in the electron impact mode. CI experiments were performed using either CH4 or NH3 as the reactant gas. Unlike CH4-CI, which fails to give molecular mass information, NH3-CI provided, in all the cases explored, an adduct ion [M+18](+) that was sufficiently stable to be detected and recorded. Information about molecular masses was very useful for the complete characterization of aglycons from glycosides occurring in virgin olive oils. Aglycons of ligstroside, of decarbomethoxyoleuropein and of oleuropein were detected. Each aglycon, because of several tautomeric equilibria involving the ring opening of secoiridoid, showed up as compounds with four main structures after derivatization with bis(trimethylsilyl)trifluoracetamide.
机译:通过质谱检测橄榄油中的酚类和类化合物化合物,化学电离(CI)允许我们获得母体离子,这些离子在电子撞击模式下无法检测到。使用CH4或NH3作为反应气体进行CI实验。与无法提供分子量信息的CH4-CI不同,在所有探索的情况下,NH3-CI均提供了足够稳定的加合物离子[M + 18](+),可以检测和记录。有关分子质量的信息对于完整表征原始橄榄油中糖苷的糖苷配基非常有用。检测到了甜菊苷,十碳甲氧基橄榄苦苷和橄榄苦苷的糖苷配基。每个糖苷配基由于涉及到类环孢素的开环的几个互变异构平衡,在用双(三甲基甲硅烷基)三氟乙酰胺衍生化后显示为具有四个主要结构的化合物。

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