中文摘要：

为准确追查责任方,溢油鉴定应该考虑混入的分散剂和其它油对原未知溢油的影响。该文以此为切入点,基于烷烃指纹研究4种原油和1种分散剂形成的几种混合油的数字化鉴别。鉴别前,先采用相对标准偏差法筛选出9个稳定的烷烃诊断比,再进行主成分分析、聚类分析和多维标度分析。结果表明：分散剂对溢油溯源的影响与油种有很大关系;混合油要么与组成其的单一油的相关性差,可能很快找到油源;要么相关性较好,容易受其他未知溢油影响,造成误判。上述分析方法在本研究中都可得到客观、准确的鉴别结果,在实际鉴别中可联合使用、相互佐证。

英文摘要：

Dispersants and other oils mixed with original unknown oil spill should be taken into consideration for accurately tracing responsibility in oil spill identification. As a breakthrough point, digitization identification of mixed oil composed of 4 kinds of crude oil and 1 kind of dispersant is studied based on alkane fingerprints in this paper. Relative standard deviation method is used to select 9 stable diagnostic ratios before identification, and then the principal component analysis, clustering analysis and multidimensional scaling analysis are used to identify oil samples. The results indicate that the influence of dispersant on oil spill source has close relation with oil type. If the correlation between mixed oil and single oil is poor, oil source may soon be found, if good, oil source may be easily influenced by other unknown oil spill, leading to misjudgment. Identification results of all analysis methods obtained in this article are objective and accurate, these methods can be used in combination in the practical identification and supporting each other.