在油气地球化学研究领域，样品预处理新方法探索已成为重要的发展方向之一。本研究拟将微波辅助萃取技术（Microwave Assisted Extraction, MAE）引入油气烃源岩样品前处理过程，实现烃源岩样品中系列烃类化合物的碳、氢同位素分析。具体研究内容：通过选择不同类型的烃源岩样品，在不同的萃取时间、温度-压力、盐度及pH值等外界条件下，研究烃源岩中烃类有机分子的萃取效率、萃取机理及同位素变化特征。该项目创新点：（1）相比传统处理技术，该方法处理速度快、提取效率高、溶剂用量少；（2）可实现微量烃源岩样品中有机物提取，样品用量在目前基础上降低1～2个数量级；（3）该方法不仅可以实现易挥发性烃类化合物的提取及碳氢同位素分析，同时也可实现常规烃类化合物的分析，从而为该技术全面引入油气地球化学研究领域奠定实验基础。

Over the past decade, sample pretreatment techniques have become one of the most important aspects in geochemical analysis field. In this investigation, we attempt to applied microwave assisted extraction (MAE) technique to sample pretreatment and achieve the compound specific isotope analysis. The analytical considerations, including the sample type, sample amount, equilibration time, extraction temperature and pH value, will be carefully considered. Compared with conventional extraction techniques, the technique can be characterized with high extraction efficiency, less sample amount and less time consumption. The MAE-GC/IRMS method can be well suited for the preparation of hydrocarbon extraction and will provide so far the reliable approach for individual compounds isotopic analysis.