Gas chromatographic mass spectrometric detection of dihydroxy fatty acids preserved in the 'bound' phase of organic residues of archaeological pottery vessels.

Gas chromatographic mass spectrometric detection of dihydroxy fatty acids preserved in the 'bound' phase of organic residues of archaeological pottery vessels.
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气相色谱质谱法检测考古陶器有机残留物“结合”相中保存的二羟基脂肪酸。

DOI:
10.1002/rcm.5038
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发表时间:
2011
期刊:
RCM
影响因子:
--
通讯作者:
Hansel FA
Hansel FA
中科院分区:
--
文献类型:
--
作者:
Hansel FA

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提出了一种测定考古陶片中保存的有机残留物“结合”相中保存的二羟基脂肪酸的方法。该方法包括皂化、酯化、硅胶柱色谱分馏和气相色谱/质谱分析。三甲基硅基醚甲酯衍生物的电子电离质谱是由相邻的两个三甲基硅基之间的键断裂产生的片段离子表征的。其他重要的碎片离子是[M-15]+。, M-31 +。,m/z147和相邻二取代(三甲基硅氧基)TMSO‐基团(Δ7,8, Δ9,10, Δ11,12和Δ13,14:m/z304, 332, 360和388)的离子特性。在考古提取物中发现的二羟基脂肪酸的碳数从c16到c22不等,浓度从0.05到14.05µg g−1不等。所观察到的广泛的二羟基脂肪酸表明,这种方法可以自信地应用于筛选考古陶器碎片,以寻找来自考古陶器容器加工的商品的单不饱和脂肪酸的降解产物。版权所有©2011 John Wiley & Sons, Ltd
A methodology is presented for the determination of dihydroxy fatty acids preserved in the ‘bound’ phase of organic residues preserved in archaeological potsherds. The method comprises saponification, esterification, silica gel column chromatographic fractionation, and analysis by gas chromatography/mass spectrometry. The electron ionisation mass spectra of the trimethylsilyl ether methyl ester derivatives are characterised by fragment ions arising from cleavage of the bond between the two vicinal trimethylsiloxy groups. Other significant fragment ions are [M–15]+., [M–31]+.,m/z147 and ions characteristic of vicinal disubstituted (trimethylsiloxy) TMSO‐ groups (Δ7,8, Δ9,10, Δ11,12and Δ13,14:m/z304, 332, 360 and 388, respectively). The dihydroxy fatty acids identified in archaeological extracts exhibited carbon numbers ranging from C16to C22and concentrations varying from 0.05 to 14.05 µg g−1. The wide range of dihydroxy fatty acids observed indicates that this approach may be applied confidently in screening archaeological potsherds for the degradation products of monounsaturated fatty acids derived from commodities processed in archaeological pottery vessels. Copyright © 2011 John Wiley & Sons, Ltd.
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