Tetracyclic polyprenoids: Indicators of freshwater (lacustrine) algal input
Tetracyclic polyprenoids: Indicators of freshwater (lacustrine) algal input
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四环聚戊二烯：淡水（湖泊）藻类输入指标
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
P. Albrecht
中科院分区：
文献类型：
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作者：
A. Holba;E. Tegelaar;L. Ellis;M. Singletary;P. Albrecht
由于湖源沉积特征和生物群落的多样性，确定原油和岩石提取物的淡水或半咸水有机输入的普遍适用指标已被证明是困难的。四环类聚异戊二烯化合物（TPP）以相对高的浓度存在于在淡水或半咸水条件下沉积的油和相关源岩中，但通常以相对低的浓度存在于来自海洋或成煤沉积环境的样品中。TPP的比率，从气相色谱-串联质谱峰面积的C30四环polyprenoid除以C26 27-norcholestanes的峰面积的总和，揭示了很大的特异性，在确定淡水或咸水藻类输入，特别是在原油。
Because of the great variety of lacustrine-source depositional characteristics and biological consortia, identification of a universally applicable indicator of freshwater or brackish-water organic input for crude oils and rock extracts has proven elusive. Tetracyclic polyprenoid compounds (TPP) are present in relatively high concentrations in oils and associated source rocks deposited under freshwater or brackish-water conditions, but typically are present in relatively low concentrations in samples from marine or coal-forming depositional environments. A TPP ratio, constructed from the gas chromatography–tandem mass spectrometry peak areas of a C30 tetracyclic polyprenoid divided by the sum of the peak areas of the C26 27-norcholestanes, revealed great specificity in identifying freshwater or brackish-water algal input, particularly in crude oils.