汽油燃烧残留物标准样品制备及特征组分研究

发布时间：2018-05-15 00:30

本文选题：汽油 + 燃烧残留物　；参考：《化学研究与应用》2017年06期

【摘要】：汽油燃烧残留物的检测往往是纵火案件侦破的关键,对鉴定机构的检验(鉴定)能力有很高的要求。汽油燃烧残留物的鉴定需要已知样品进行比对分析,但目前还没有相应的标准样品可以提供。因此,建立汽油燃烧残留物标准样品有助于对鉴定机构相应的鉴定能力进行培养和考察。本研究以石英砂为燃烧载体,93号汽油为助燃剂,制备汽油燃烧残留物标准样品,对比研究了溶剂法和直接顶空进样法对汽油燃烧残留物的提取效果。气相色谱-质谱法的分析结果表明,汽油在燃烧前后的特征组分存在明显差异,不同的提取方法对检测结果有一定影响,但是特征组分的变化趋势是一致的,取代的芳烃和稠环芳烃等特征组分的鉴别和含量的相对大小可以作为汽油燃烧残留物鉴定的重要判定依据。
[Abstract]:The detection of gasoline residue is often the key to solve arson cases. The identification of gasoline combustion residues requires comparison analysis of known samples, but no corresponding standard samples are available. Therefore, the establishment of gasoline combustion residue standard sample is helpful for the cultivation and investigation of the identification ability of the identification institutions. In this study, the standard sample of gasoline combustion residue was prepared with quartz sand as combustion carrier and gasoline 93 as fuel booster. The extraction effect of gasoline combustion residue by solvent method and direct headspace injection method was compared. The analysis results of gas chromatography-mass spectrometry show that there are obvious differences in the characteristic components of gasoline before and after combustion, and different extraction methods have a certain influence on the detection results, but the change trend of the characteristic components is the same. The identification and relative content of substituted aromatics and polycyclic aromatic hydrocarbons can be used as an important basis for the identification of gasoline combustion residues.
【作者单位】：公安部四川消防研究所;
【基金】：国家重点研发计划课题(2016YFC0800605)资助四川省地方标准制(修)订项目(Z20158802SC)资助
【分类号】：D918.9;O657.63

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