关于PET材质汽油盛装容器燃烧残留物特征研究

Study on the Combustion Residue Characteristics of PET Gasoline Container

通过模拟汽油放火场景,从容器材质、汽油残留量百分比的角度研究了PET材质汽油盛装容器燃烧残留物的痕迹变化规律。结果表明,燃烧环境相同时,汽油盛装容器与未盛装过汽油容器的燃烧残留物在位置变化、形状特点、表面特征、炭化程度和断面及底部特征等方面有显著差别。随汽油残留量的增多,这种差距越来越明显。可结合气相色谱质谱联用等分析手段来判断火场中PET材质容器是否为汽油盛装容器,从而帮助获取疑似放火案件的核心物证。

Gasoline container is often the key physical evidence in incendiary fires using gasoline as oxidizing agent, so it is of great significance to study the burning patterns of the common gasoline containers for identifying the fire cause. Through simulating incendiary fire scenarios ignited by gasoline, the combustion residue patterns of PET gasoline filled containers were studied in this paper from the perspectives of container material and gasoline residue percentage. The results showed that with the same combustion environment significant differences existed between the combustion residues from the gasoline container and the container not filled with gasoline in the aspects of position change, shape features, surface characteristics, carbonization degree, the fracture surface and bottom characteristics. With the increase of gasoline residue, the difference became more obvious. Combined with analytical techniques such as gas chromatography-mass spectrometry the conclusion could be applied to determine whether the PET material container found in the fire scene is a gasoline container, thus assist to obtain the key physical evidence for a suspected arson