中文摘要：

通过分析中国代表性原油、氯仿沥青“A”组分碳同位素和正构烷烃单体碳同位素组成,探讨其在溢油鉴定中的应用。结果表明,原油的碳同位素组成具有母质继承效应,不同来源的原油及其氯仿沥青“A”组分的碳同位素类型曲线形状不同,可以利用这种规律进行溢油鉴定。碳同位素的抗风化性是其用于油指纹鉴别的最大优点。正构烷烃单体碳同位素分析使得有机质碳同位素研究进入分子级水平,因其特征性和稳定性正日益成为重要且有效的油类污染物的“环境示踪剂”。

英文摘要：

Carbon isotope method was a new approach that developed for identiiying spilled oils and petroleum products. The δ13C values of an individual n-alkane in crude oils and their fractions （saturate, aromatic, polar, and asphaltene） were determined using MAT252 Isotope Mass Spectrometer. The results showed that carbon isotope ratios of crude oils had the inherited effect, different oils presented different carbon isotopic type curve. This characteristic could be well used as an effective indicator in tracing contaminant and monitoring their fates in environment. A simulated weathering experiment were performed on crude oil sample （CDM-2）, after a week of weathering, the obtained oil sample （CDM-W） had the similar carbon isotopic type curve with that of CDM-2, which indicated that weathering had neglect effect on the carbon isotope ratios of oils. Therefore, the carbon isotope determination was an effective and stable method for oil spill identification.