柴油的指纹提取及基于其指纹信息的层次聚类分析

摘要

采用气相色谱/质谱方法对6种常见柴油中的主要生物标志物进行定量分析,并基于生物标志物指纹信息进行了层次聚类分析.结果表明:(1)柴油中含有丰富的饱和链烷烃生物标志物；双环倍半萜类生物标志物含量较高,分布特征显著,较好地补充了柴油中生物标志物的指纹信息.(2)柴油中美国环境保护署优先控制的多环芳烃含量较低,含有非常少量的沸点较高的5环以上的多环芳烃.(3)基于柴油指纹信息的层次聚类分析与产地和凝点无关,与指纹信息所反映出来的生物标志物组成特征关系密切.%Primary biomarkers in six diesels produced were analyzed quantitatively using gas chromatography/ mass spectrometry (GC/MS). Hierarchical clustering analysis was done based on fingerprint information. The result showed that the paraffinic hydrocarbons and PAHs were much plentiful in diesels. The content of bicyclic sesquiter-panes biomarker was high and with distinct distribution character,which could well supplement the fingerprint information of biomarker in diesel. The US EPA listed priority pollutants PHAs and pentacyclic triterpanes were much lower in diesels. The fingerprint information based hierarchical clustering analysis was no relevant to the origin and condensation point of diesel, while it was closely related to compositional features of biomarker reflected by fingerprint information.