IsoPrime稳定同位素质谱仪通过长链烷烃的同位素特征来区分和量化不同来源的混合油

Combined with quantitative determination of concentration and isotopic composition of petroleum hydrocarbons, weathering simulation experiments on artificially mixed oils and their two end-member oils are performed for identification and quantification of mixed sources. The >C18 n-alkanes show no appreciable losses during a short-term weathering process. An approach based on distribution of longchain n-alkanes (>C18) is suggested for estimating the contribution proportion of each source in mixed oils. Stable carbon isotope profile of individual n-alkanes is a powerful tool to differentiate sources of oil spills, but unavailable to accurately allocate each contribution due to a relatively large analytical error.