聚乙烯塑料制品燃烧残留物对柴油分析鉴定的影响  

The Infl uence of Burning Residues of Polyethylene Plastic Products on the Analysis and Identifi cation of Diesel Fuel

作　　者：纪博睿 王丽娜 段卫宇 王硕[1,2,3] 祁丽杰 王美臻 王文俊 JI Borui;WANG Lina;DUAN Weiyu;WANG Shuo;QI Lijie;WANG Meizhen;WANG Wenjun(Liaoning Inspection,Examination&Certifi cation Centre,Shenyang 110036,China;Liaoning Institute of Product Quality Supervision and Inspection,Shenyang 110032,China;National Quality Supervision&Testing Center of Petroleum Products(Shenyang),Shenyang 110144,China;Shenyang Fire Research Institute of MEM,Shenyang 110034,China)

机构地区：[1]辽宁省检验检测认证中心,沈阳110036 [2]辽宁省产品质量监督检验院,沈阳110032 [3]国家石油产品质量监督检验中心(沈阳),沈阳110144 [4]应急管理部沈阳消防研究所,沈阳110034

出　　处：《刑事技术》2023年第4期364-370,共7页Forensic Science and Technology

基　　金：辽宁省自然科学基金计划重点项目(20170520108)。

摘　　要：本文以聚乙烯(PE)塑料制品——保鲜膜和聚乙烯原料为研究对象,探究二者对纵火现场助燃剂柴油分析鉴定的影响。利用固相微萃取–气相色谱–质谱法(SPME-GC-MS)对本体、未完全燃烧、完全燃烧至自燃熄灭三种不同燃烧状态下的样品与柴油的特征谱图进行对比分析。通过聚乙烯原料和PE保鲜膜本体进行对比分析发现,二者所含主要成分基本相同,PE保鲜膜中含有的个别组分在聚乙烯原料中并未检测到,主要是由于PE保鲜膜在生产过程中加入了一些添加剂所致。未完全燃烧保鲜膜对柴油分析影响最大,当m/z=85、178、192、183时,二者含有相同的成分且分布规律也基本相同,但当提取离子m/z=83时,未完全燃烧保鲜膜样品中不含有与柴油相同的环烷烃。应用SPME-GC-MS技术可以将未完全燃烧保鲜膜与柴油区分开,该方法灵敏度高,分析速度快,适用于火场中助燃剂的分析。Detecting and identifying the combustion promoter residue in the fi re site sample is a diffi cult task.The fi re combustion process may be accompanied by pyrolysis,weathering/evaporation or microbial degradation of the combustion agent,etc.,making the collection of residues diffi cult,and the subsequent identifi cation of the fi re combustion agent material evidence also brings interference,so it is very important to determine the nature of the fi re and fi nd out the cause of the fi re in a timely and accurate manner whether there are diesel and other combustion aids at the fi re scene.In this paper,polyethylene(PE)plastic products-plastic wrap and polyethylene raw materials were used as research objects to explore the infl uence of them on the analysis and identifi cation of diesel fuel,an ignition booster at the scene of arson.Solid phase microextraction-gas chromatography mass spectrometry(SPME-GC-MS)was used to compare and analyze the characteristic spectra of samples and diesel fuel in three different combustion states:bulk body,incomplete combustion,complete combustion to spontaneous combustion extinguishing.Through the comparative analysis of polyethylene raw materials and PE plastic wrap body,it is found that the main components contained in the two components are basically the same,and the individual components contained in PE plastic wrap are not detected in polyethylene raw materials,mainly due to the addition of some additives in the production process of PE plastic wrap.Incomplete combustion of plastic wrap in the three combustion states has the greatest effect on diesel.When m/z=85,178,192,183,the two contain the same components and the distribution law is basically the same,but when the ion m/z=83 is extracted,the sample of incomplete combustion plastic wrap does not contain the same naphthene as diesel.The application of SPME-GC-MS technology can distinguish incomplete combustion plastic wrap from diesel,which is convenient and fast,has high sensitivity and fast analysis speed,and can be used as

关 键 词：化学分析 火灾鉴定 固相微萃取–气相色谱–质谱法 聚乙烯塑料制品 柴油 

分 类 号：DF794.3[政治法律—诉讼法学]