基于化学成分关联的二烯类橡胶垫对汽油鉴定干扰性研究

引用本文: 李慷旭, 金静, 李秋璠梓, 钱佩雯, 殷果, 张金专. 基于化学成分关联的二烯类橡胶垫对汽油鉴定干扰性研究[J]. 分析化学, 2022, 50(3): 454-464. doi: 10.19756/j.issn.0253-3820.210674 shu

Citation: LI Kang-Xu, JIN Jing, LI Qiu-Fan-Zi, QIAN Pei-Wen, YIN Guo, ZHANG Jin-Zhuan. Study on Interference by Diene Rubber Pads to Gasoline Identification Based on Correlation of Interferent Chemical Composition and Interference Extent[J]. Chinese Journal of Analytical Chemistry, 2022, 50(3): 454-464. doi: 10.19756/j.issn.0253-3820.210674 shu

基于化学成分关联的二烯类橡胶垫对汽油鉴定干扰性研究

李慷旭 ^1, ,
金静 ^{2,
,} ,
李秋璠梓 ^1, ,
钱佩雯 ^1, ,
殷果 ^1, ,
张金专 ^{1,
,}

¹中国人民警察大学研究生院, 廊坊 065000;
²中国人民警察大学侦查学院, 廊坊 065000

通讯作者: 金静,E-mail:jinj@iccas.ac.cn; 张金专,E-mail:848075906@qq.com

基金项目:
河北省自然科学基金项目（No.E2021507001）和公安部技术研究计划项目（No.2020JSYJC24）资助。

摘要: 基质干扰一直是火灾现场助燃剂物证鉴定领域研究的重点和难点。本研究基于前期对分子结构中含有"烷基苯"的典型基质丁苯橡胶的研究结果，考察了干扰性与分子结构的相关性，为进一步探究基质材料干扰助燃剂检验鉴定的官能团结构，选择4种二烯类橡胶垫（丁苯橡胶垫、天然橡胶垫、丁基橡胶垫和三元乙丙橡胶垫）为研究对象，以确定含二烯类结构的橡胶制品对汽油鉴定的干扰性。采用气相色谱-质谱法（GC-MS）对汽油、橡胶垫和橡胶垫加载汽油后的燃烧残留物进行成分分析。结果表明，所有二烯类橡胶垫样品燃烧残留物中几乎均能检出国家标准中用于认定汽油燃烧残留物的所有目标化合物，包括烷基苯、茚满、稠环芳烃及多环芳烃，对汽油鉴定造成显著干扰，过度依赖定性的组分分析容易得出"假阳性"的错误结论；5 g橡胶垫加载0.5 mL汽油混合燃烧的残留物与汽油特征组分种类基本相同，但是C2苯与C3苯的相对含量不同，同时C2苯中3个典型组分的相对含量也与汽油不同。本研究结果再次验证了火场基质对易燃液体残留物（ILRs）检验鉴定的干扰程度与其化学成分存在关联性，可为理解火场助燃剂物证检验鉴定基质干扰机理提供新思路，为预测基质干扰性及干扰程度提供参考。

关键词:

English

Study on Interference by Diene Rubber Pads to Gasoline Identification Based on Correlation of Interferent Chemical Composition and Interference Extent

¹Graduate Department, Chinese People's Police University, Langfang 065000, China;
²School of Criminal Investigation, Chinese People's Police University, Langfang 065000, China

Corresponding author: JIN Jing, ; ZHANG Jin-Zhuan,

Received Date: 11 August 2021
Revised Date: 27 November 2021
Fund Project:
Supported by the Natural Science Foundation of Hebei Province, China (No.E2021507001) and the Funds of Ministry of Public Security of the People's Republic of China (CN) (No.2020JSYJC24).

Abstract: The matrix interference has been regarded as the key and difficult point in fire debris analysis. Based on our previous research on styrene-butadiene rubber, a typical matrix involving ‘alkylbenzene’ in molecular structure was correlated with the interference and molecular structure. To further explore the functional group of the matrix interfering with the ignited liquid residues (ILRs) identification, four diene rubber pads, i.e., styrene-butadiene rubber pad, natural rubber pad, butyl rubber pad and ethylene propylene diene monomer rubber pad, were selected in the study. With gas chromatography-mass spectrometry (GC-MS) analysis, the characteristic compounds analysis was made on fire debris of gasoline, rubber pads, and rubber pads after addition of gasoline. The results showed that almost all the target compounds used for gasoline identification could be detected in fire debris of all the diene rubber pad samples, including alkylbenzenes, homologs of indenes, condensed aromatic hydrocarbons, and polycyclic aromatic hydrocarbons, which indicated that the diene rubbers caused remarkable interference to gasoline identification, and overreliance on the presence of target compounds would lead to misidentifications in the presence of diene rubber residues. When 0.5 mL of gasoline was added to 5 g rubber pads, the chromatographs of the fire debris were relatively similar to that of gasoline, suggesting that the existence of diene rubber did not have a false negative effect on gasoline identification. The research results effectively verified once again that the interference extent of matrixes in fire scene was correlated with its chemical composition, which could provide a new idea for understanding the matrix interference to ILRs and predicting the interference extent from the viewpoint of chemical structure.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

基于化学成分关联的二烯类橡胶垫对汽油鉴定干扰性研究

通讯作者: 金静,E-mail:jinj@iccas.ac.cn; 张金专,E-mail:848075906@qq.com

English

Study on Interference by Diene Rubber Pads to Gasoline Identification Based on Correlation of Interferent Chemical Composition and Interference Extent

Corresponding author: JIN Jing, ; ZHANG Jin-Zhuan,

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

基于化学成分关联的二烯类橡胶垫对汽油鉴定干扰性研究

通讯作者: 金静,E-mail:jinj@iccas.ac.cn; 张金专,E-mail:848075906@qq.com

English

Study on Interference by Diene Rubber Pads to Gasoline Identification Based on Correlation of Interferent Chemical Composition and Interference Extent

Corresponding author: JIN Jing, ; ZHANG Jin-Zhuan,

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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