Coast Institute, Ludong University, Yantai, 264025, People's Republic of China.
Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, People's Republic of China.
Environ Sci Pollut Res Int. 2018 Apr;25(10):9539-9546. doi: 10.1007/s11356-018-1257-2. Epub 2018 Jan 22.
Clearing up whether spilled oil is mixed or not can strengthen the accuracy of oil spill identification. In the present study, the biomarkers in spilled oil samples were detected. The weathering modes of different types of diagnostic ratio and carbon isotope values of individual n-alkanes were also analyzed. The results showed that the diagnostic ratios of steroids, terpenes and aromatics, and weathering characteristics of carbon isotope composition (δC) of individual n-alkanes supported the idea that Dalian oil spill emerged from a single oil source. Furthermore, commonly used diagnostic ratios of n-alkanes indicated that the Dalian oil spill had undergone the oil mixing process. The different identifying outcomes indicate that some kinds of n-alkane-rich substance (such as oil dispersants) were mixed in the Dalian spilled oil and interfered with the routine diagnosis ratios of n-alkanes.
厘清溢油是否混合可以提高溢油鉴别准确性。本研究检测了溢油样品中的生物标志物，并分析了不同类型的诊断比值和单体正构烷烃碳同位素值的风化模式。结果表明，甾萜类、芳烃类的诊断比值以及单体正构烷烃碳同位素组成（δC）的风化特征支持了大连溢油来自单一油源的观点。此外，常用的正构烷烃诊断比值表明大连溢油经历了油混合过程。不同的鉴别结果表明，大连溢油中混入了一些富含正烷烃的物质（如油分散剂），干扰了常规的正烷烃诊断比值。
