Negative ion ESI-MS analysis of natural yellow dye flavonoids-An isotopic labelling study
Negative ion ESI-MS analysis of natural yellow dye flavonoids-An isotopic labelling study
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DOI：
10.1016/j.ijms.2008.05.039
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发表时间：
2009-07-01
影响因子：
1.8
通讯作者：
Quye, Anita
中科院分区：
文献类型：
--
作者：
McNab, Hamish;Ferreira, Ester S. B.;Quye, Anita
黄色素是绘画中最常用的天然黄色着色剂之一，如湖泊，以及历史纺织品中的媒染染料。本文利用同位素标记底物的证据，提出了负离子电喷雾碰撞诱导黄酮类化合物、黄酮醇类化合物和黄酮类化合物分解的机理。这些机制包括逆Diels-桤木断裂（观察到黄酮和黄酮醇）和M-122断裂（3 '，4'-二羟基黄酮醇的特征）。此外，m/z 125碎片离子的存在被证明是2 '-羟基黄酮醇的特征，m/z 149处的离子被证明是4'-羟基黄酮的特征。这些方法的应用举例说明了鉴定的一个次要成分的戴尔的甘菊（春黄菊L。）以及鉴定从一件18世纪世纪苏格兰格子呢碎片中取样的绿色线的染料来源。(C)2008 Elsevier B. V.保留所有权利。
Flavonoids are amongst the most commonly used natural yellow colourants in paintings, as lakes, and in historical textiles as mordant dyes. In this paper, evidence from isotopically labelled substrates is used to propose negative ion electrospray collision induced decomposition mechanisms of flavones, flavonols and an isoflavone. These mechanisms include a retro-Diels-Alder fragmentation (observed for flavones and flavonols) and an M-122 fragmentation (characteristic of 3',4'-dihydroxyflavonols). In addition, the presence of a m/z 125 fragment ion is shown to be characteristic of 2'-hydroxyflavonols and an ion at m/z 149 is shown to be characteristic of 4'-hydroxyflavones. Applications of these methods are exemplified by the identification of a minor component of Dyer's camomile (Anthemis tinctoria L.) and the identification of the dye source in green threads sampled from an 18th Century Scottish tartan fragment. (C) 2008 Elsevier B.V. All rights reserved.