中文摘要：

以渤海原油和3种分散剂的混合物为对象,研究分散剂的种类和相对含量对原油指纹的影响。采用溢油鉴别中常用的重复性限法对烷烃诊断比进行分析。经对原油及以不同比例配制的分散剂和原油混合物的组内和组间分析比较后发现,分散剂的种类和相对含量对一些烷烃诊断比值有影响。渤海原油中受上述分散剂影响较小的诊断比为：C17/C18、C23＋C25＋C27＋C29/C24＋C26＋C28＋C30和C19＋C20/C19＋C20＋C21＋C22。研究结果表明,在溢油鉴定中应该考虑可能的分散剂影响,以便选择合适的诊断比进行溢油溯源及鉴定。研究结果为准确追溯溢油源和明确责任纠纷提供更为客观的技术支撑。

英文摘要：

Mixture samples of Bohai crude oil and 3 kinds of dispersants are set as the research object. Whether types and relative content of dispersant affects oil fingerprints（alkanes diagnostic ratios） is investigated by repeatability limit method that is often used in oil fingerprint identification. It is found that some diagnostic ratios are affected by types and relative content of dispersant after analysis and comparison within the group and between groups of oil samples including original crude oil and oils mixed with dispersant in different ratios. Diagnostic ratios of Bohai crude oil little affected by dispersant are C17/C18、C23＋C25＋C27＋C29/C24＋C26＋C28＋C30and C19＋C20/C19＋C20＋C21＋C22.. Research results indicate that the influence of dispersant should be considered in oil fingerprint identification in order to choose appropriate diagnostic ratios for oil spill traceability and identification. The research results could provide more objective technical support to accurately trace the oil spill source and definitely settle responsibility disputes.