中国人民警察大学学报

为研究不同燃烧时间下汽油燃烧残留物特征组分的变化，模拟不同燃烧时间条件，制备汽油燃烧残留物样品，利用GC-MS技术进行检验鉴定，并利用归一化法对其特征组分进行定量分析。结果表明：烷烃类组分燃烧后变化较为显著，其中燃烧时间较短时癸烷含量最多，峰面积占比为46.0%，但随着燃烧时间增加其相对含量降低，在燃烧90 s时壬烷峰面积占比最多(40.1%)；芳香烃类组分保留较好，其中C₃苯最为稳定，C₄苯相对含量由21.7%升至31.9%,C₅苯含量最少；稠环芳烃类组分较为稳定，其中萘是稠环芳烃中的最主要物质；茚满类物质始终较为稳定，其中茚满是含量占比最大的特征组分。研究结果可为放火案件侦查中汽油燃烧残留物检验鉴定工作提供数据支撑和参考。

To study the changes in characteristic components of gasoline combustion residues under different combustion times, a simulation was conducted.Gasoline combustion residue samples were examined with the use of GC-MS technology, and their characteristic components were quantitatively analyzed with the use of normalization method.The results show that the changes in alkane components after combustion are more significant; among them, the decane content is the most component with a peak area accounting for 46.0% when the combustion time was short; however, as the combustion time increases, its relative content decreases, the peak area of nonane accounted for the highest proportion(40.1%) at 90 seconds of combustion.The aromatic hydrocarbon components are well preserved; among them, C₃ benzene is the most stable components, and the relative content of C₄ benzene increases from 21.7% to 31.9% while the content of C₅ benzene is the least.The components of polycyclic aromatic hydrocarbons are relatively stable; among them, naphthalene is the most component.Indene like substances are always relatively stable; among them, indene is the characteristic component with the highest proportion of content.The research results can provide data support and reference for the examination and identification of gasoline combustion residues.