在油气地质学研究领域，单体烃的碳/氢同位素组成特征对于判识油气的生成、运移、聚集等地质过程有着现实的科学意义。但由于分析技术的原因，油气中的微量烃类化合物同位素分析进展一直不大。本研究拟将固相微萃取（SPME）技术系统引入该领域，实现微量烃类化合物的前处理，在既有工作基础上全面开展低浓度样品的碳/氢同位素组成分析。.研究内容：（1）在不同温度、压力下，选用不同类型的固定相涂层对油气中微量烃类化合物进行预处理，并评价不同类型的固定相涂层的吸附-脱附行为；（2）对各种类型天然气样品中微量化合物进行富集并进行同位素分析，并研究外界条件的变化对同素值的影响程度；（3）对实验条件进行优化，利用该技术系统建立微量烃类化合物的碳、氢同位素分析方法。.创新性：将固相微萃取这一国际前沿的样品预处理技术全面系统引入油气同位素分析领域，为拓展微量烃类化合物在油气研究领域研究奠定基础。

In oil and gas geologic research field, the carbon/hydrogen isotopic characteristics of individual hydrocarbon has a realistic scientific significance for the research of geological process of oil and gas generation, migration and accumulation. For the reason of analysis technique, the isotope analysis of trace hydrocarbon gas especially hydrogen isotope analysis has been little progress. This research mainly focuses on introducing the solid phase microextraction (SPME) technique into this field and achieve the enrichment of trace hydrocarbons before carbon/ hydrogen isotope composition analysis. The research contents are as follow ：Ⅰ. Evaluate the adsorption-desorption process behavior of different types of stationary phase coating in different temperature, pressure. Ⅱ.Carry out the trace compounds enrichment and isotopic analysis of different type samples at different external conditions with the influence degree of value. Ⅲ. Optimize the experimental conditions and established the analysis method of carbon, hydrogen isotope compotion for trace hydrocarbons. The innovation maily show the systematic introduction of the advanced sample pretreatment technique into the isotope analysis fields, which will lay the foundation for expanding oil and gas research in trace hydrocarbons.