催化加氢热解/气相色谱-质谱研究沉积物中生物标志物

针对地质体中高演化沉积有机质，应用催化加氢热解/气相色谱-质谱方法测定了干酪根中以共价键结合的生物标志物。结果表明，实验样品的催化加氢热解产物收率明显高于二氯甲烷（DCM）索氏抽提，产物色谱图中饱和烃的峰形、保留时间和质谱特征与索氏抽提峰形基本一致；对比两种方法产物中饱和烃主要指标甾烷m/z 217和藿烷m/z 191表明，经过加氢还原，干酪根分子网络中共价键结合着两种生物标志物分子骨架得到印证，为催化加氢热解提取沉积物中生物标志物的方法可靠性提供了依据。催化加氢热解/气相色谱-质谱技术是一种对研究高演化沉积有机质中生物标志化合物有独特作用的有效分析手段。

Study on biomarker compounds in sediments via catalytic HYPY/GC-MS

A method has been developed for the release and determination of biomarker compounds in the covalently bound biomarkers of higher evolution sedimentary organic matters by catalytic hydropyrolysis HYPY/GC-MS. The analytical results of steroids m/z 217 and hopanoids m/z 191 agree with the results obtained using DCM (CH_2Cl_2) Soxhlet extraction, and the hydropyrolysis yield is much higher than that of DCM extraction. It is considered that catalytic hydropyrolysis is a unique technique for biomarkers releasing from kerogen in high yield without affecting their biologically-inherited stereochemistries, fewer carbon skeletal rearrangement, and mild reaction condition. The experimental results show that these primary components in the molecular skeleton of the sedimentary organic matter (SOM) can be released rationally by catalytic hydropyrolysis (HYPY), and applied in oil/oil correlation, oil/source correlation, the sedimentary environments of organic matter in oil pools, the secondary reconstruction of oil pools and other researches.