Comparison of liquid chromatography-isotope ratio mass spectrometry (LC/IRMS) and gas chromatography-combustion-isotope ratio mass spectrometry (GC/C/IRMS) for the determination of collagen amino acid δ13C values for palaeodietary and palaeoecological rec
作者:Philip J. H. Dunn、Noah V. Honch、Richard P. Evershed
DOI:10.1002/rcm.5174
日期:2011.10.30
Results are presented of a comparison of the amino acid (AA) δ13C values obtained by gas chromatography–combustion–isotope ratio mass spectrometry (GC/C/IRMS) and liquid chromatography–isotope ratio mass spectrometry (LC/IRMS). Although the primary focus was the compound‐specific stable carbon isotope analysis of bone collagen AAs, because of its growing application for palaeodietary and palaeoecological
结果表示的氨基酸(AA)的比较的δ 13个气相色谱-燃烧同位素比率质谱仪(GC / C / IRMS)和液相色谱-同位素比率质谱仪(LC / IRMS)获得的C值。虽然主要重点是因为其对palaeodietary和古生态重建不断增长的应用的骨胶原的AA的具体化合物稳定的碳同位素分析,结果是相关的,其中AA任何字段δ 13个是必需的C值。我们将LC / IRMS与使用N的最新GC / C / IRMS方法进行比较-乙酰甲基酯(NACME)AA衍生物。这种比较涉及分析人类考古胶原的标准AA和水解产物,这些物质先前已作为N-三氟乙酰基异丙基酯(TFA / IP)进行了研究。观察到,尽管GC / C / IRMS分析所需的样品较少,但LC / IRMS允许分析范围更广的AA,尤其是那些不适合GC分析的AA(例如精氨酸)。因此,重构的散装δ 13个C值基于LC / IRMS衍生δ 13个C值分别为接近EA