The effect of improved chromatography on GDGT-based palaeoproxies
The effect of improved chromatography on GDGT-based palaeoproxies
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DOI：
10.1016/j.orggeochem.2015.12.006
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发表时间：
2016-03-01
影响因子：
3
通讯作者：
Damste, Jaap S. Sinninghe
中科院分区：
文献类型：
--
作者：
Hopmans, Ellen C.;Schouten, Stefan;Damste, Jaap S. Sinninghe
使用液相色谱-质谱联用分析甘油二烷基甘油四醚（GDGT）的方法的发展大大扩展了生物标志物工具箱，并导致了几个新的代理的发展。最近的研究表明，新的高效液相色谱方法大大改善了GDGT异构体的分离和新异构体的检测。在这里，我们提出了一种色谱方法的基础上，两个超高效液相色谱硅胶柱能够分离范围广泛的GDGT具有良好的分辨率，并与以前公布的方法相比，有利。该方法在TEX 86的一部分全球校准集上进行了测试，这是一个海水温度的代理，在MBT 5 Me的一部分全球校准集上进行了测试，这是一个空气温度的代理，我们的结果表明，新的高分辨率色谱法导致了一个显着但很小的偏移（
The development of methods using liquid chromatography coupled to mass spectrometry to analyze glycerol dialkyl glycerol tetraethers (GDGTs) has substantially expanded the biomarker tool box and led to the development of several new proxies. Recent studies have shown that new high performance liquid chromatography methods have substantially improved separation of GDGT isomers and detection of novel isomers. Here we present a chromatographic method based on two ultra-high performance liquid chromatography silica columns capable of separating a wide range of GDGTs with good resolution and which compares favorably with previously published methods. This method was tested on a part of the global calibration set of the TEX86, a proxy for sea water temperature, and on a part of the global calibration set of the MBT5Me, a proxy for air temperature, and CBT', a proxy for soil pH. Our results show that the new high resolution chromatography method leads to a significant but small offset (