【摘要】 采用逐步增加洗脱液极性的方法对原油中的多环芳烃进行分离、富集,从而使原油中的菲及甲基菲等化合物达到单体碳同位素组成测定的条件;并应用色谱-同位素比值质谱(GC-IRMS)技术对吐哈盆地原油中烷基萘和烷基菲等系列化合物的碳同位素组成进行了测定。结果表明,来源于煤系地层的烷基萘、烷基菲的δ13C值主要分布在-20‰-28‰,相对于海相来源的明显富集13C,可作为探讨有机质来源以及原油对比的新指标。更多还原

【Abstract】 Phenanthrene and methyphenanthrenes, further separated and enriched from aromatic hydrocarbon fraction with adding the polarity of eluant step by step, can meet the requirement of individual carbon isotope analysis. The carbon isotopic compositions of alkylnaphthalenes and alkylphenanthrenes in the crude oils of Turpan-Hami basin are determined by using the above method of enrichment and gas chromatogra-phy-isotope ratio mass spectrometry (GC-IRMS) technique. The result shows that the alkylnaphthalenes and alkylphenanthrenes from coal measures obviously enriched in 13C, ranging from -20‰-28‰, comared with the same compounds from marine source, and the δ13C value of individual polycyclic aromatic hydrocarbons can be considered as a potential marker for the origin of organic matter and oil correlation.更多还原