|
| 基于热解程度影响分析ABS对火场汽油鉴定干扰性 |
| Study on the Interference of Pyrolysis Degree on Gasoline Identification at Fire Scenes Based on ABS Analysis |
| 投稿时间：2025-05-18 修订日期：2025-07-12 |
| 查看/发表评论 下载PDF阅读器 |
| DOI： |
| 基金项目:中国人民警察大学重点专项计划资金(ZDZX202502); 河北省自然科学基金(E2021507001) |
|
| 中文关键词: 火场残留物分析 汽油鉴定 基质干扰 热解残留物 气相色谱-质谱 |
| 英文关键词:fire debris analysis gasoline identification matrix interference pyrolysis residues gas chromatography-mass spectrometry |
| 摘要点击次数: 155 |
| 全文下载次数: 0 |
| 中文摘要: |
| 基于课题组前期围绕基质干扰的研究结果，为进一步探究基质热解过程对其干扰火场汽油检验鉴定的影响，本文选取含杂原子塑料丙烯腈－丁二烯－苯乙烯共聚物（ABS）为研究对象。基于其热性能和热解气体分析结果，选用锥形量热仪制备不同热解程度的ABS残留物，并通过自由燃烧实验制备ABS燃烧残留物。在对残留物宏观特征进行对比观察的基础上，使用气相色谱-质谱（GC-MS）对热解/燃烧残留物成分进行分析。结果表明ABS有340-430 °C和430-600 °C两个热解阶段，低热解程度的ABS残留物仅能检出C2苯，对汽油鉴定的干扰性小。而高热解程度的残留物中均能检出烷基苯、稠环和茚满类组分，对汽油检验鉴定有较大干扰。以上结论对理解火场条件下塑料材料对汽油鉴定的干扰提供了参考。 |
| 英文摘要: |
| Based on the previous research results of our research group regarding matrix interference, this paper to further explored the impact of the matrix pyrolysis process on its interference to gasoline identification in fire scenes. Acrylonitrile-butadiene-styrene copolymer (ABS) containing heteroatoms was selected as the research object. Based on its thermal properties and pyrolysis gas analysis, ABS residues with varying degrees of pyrolysis were prepared using a cone calorimeter, while combustion residues were obtained through free-burning experiments. The macroscopic characteristics of the residues were observed, and their composition was analyzed using gas chromatography-mass spectrometry (GC-MS). The results indicated that ABS underwent two distinct pyrolysis stages: 340–430 °C and 430–600 °C. In low-degree pyrolysis residues, only C2-alkylbenzenes were detected, posing minimal interference to gasoline identification. However, in high-degree pyrolysis residues, alkylbenzenes, condensed ring aromatics, and indane compounds were present, leading to greater interference. The above conclusions provided the understanding of the interference of plastic materials to gasoline identification under fire conditions. |
| 关闭 |
