橡胶对汽油GC-MS鉴定的影响研究  

Effect of Rubber on Gasoline GC-MS Identification

作　　者：刘玲[1] 李欣 胡何昕 

机构地区：[1]武警学院,河北廊坊065000

出　　处：《武警学院学报》2017年第12期86-89,共4页Journal of the Armed Police Academy

基　　金：河北省科技计划项目"基于联用技术的橡胶对汽油放火火灾认定的干扰研究"(16275427)阶段性成果

摘　　要：汽车放火火灾近年来屡屡发生,而轮胎橡胶对汽油助燃剂的检测存在一定干扰。为研究火场中橡胶对汽油鉴定的影响,模拟火场条件,基于气相色谱-质谱法,对橡胶单独燃烧及橡胶汽油混合物燃烧的残留物谱图特征进行了分析。结果表明:橡胶燃烧残留物检出物质与汽油燃烧残留物成分相似,以重组分为主;稠环芳烃类组分和多环芳烃类组分较为稳定,对汽油鉴定的干扰较大;区别于汽油燃烧残留物的是,橡胶燃烧残留物烷烃类组分主要集中在C12以上,芳香烃类物质匹配度较低,且可检出对苯二胺。试验结果可以为火灾物证鉴定工作中的汽油检测提供参考。Arson fire of vehicle has happened frequently in recent years, but vehicle＇ s tire rubber can interfere with the detection of gasoline＇ s existence in the fire. In order to study the effect of rubber on the identification of gasoline in fire investigation, the spectrum characteristics of the combustion residue of rubber and rubber - gasoline mixture are analyzed on the basis of gas chromatography -mass spectrometry. The results show that the combustion residue compositions of rubber are similar to gasoline＇ s, mainly made up of heavier compositions ; it is the stable polycyclic aromatic hydrocarbons and polycyclic aromatic hydrocarbons in rubber combustion residue that interfere with the i- dentification of gasoline ; what distinguishes the combustion residue compositions of rubber from gasoline＇ s is that the number of carbon atoms in rubber＇s alkane components is more than 12, the matching degree of aromatic hydrocar- bon is low, and p -phenylenediamine can be detected in rubber combustion residue. The experimental results can provide reference for the detection of gasoline in fire evidence identification.

关 键 词：汽油鉴定 GC-MS 橡胶 火灾调查 

分 类 号：X928.7[环境科学与工程—安全科学]