基于GC/MS的放火火灾汽油鉴定研究进展

Research Progress of Gasoline Identification in Arson Cases Based on GC/MS

放火火灾现场常见的助燃剂是汽油,目前对汽油的鉴定方法主要是气相色谱-质谱联用法(GC/MS法)。对放火火灾现场中汽油的GC/MS鉴定方法的前处理相关问题进行了分析,并对从被检样品中提取汽油组分的方法进行了研究。对GC/MS鉴定方法的干扰排除技术进行了分析,克服杂质干扰问题需要有效辨识在不同提取条件下汽油的特征化合物种类、含量与采用多种技术优化谱图识别。

Gasoline is the most commonly used fuel by arsonists. Nowadays,Gas Chromatography-Mass Spectrometry（ GC/MS） is the chief method for gasoline identification at fire scenes. This paper analyzes the related problems of gasoline residue identification in the prepossessing technology of GC/MS,and explores the methods to extract gasoline components from the samples. In order to eliminate the impurity interference of GC/MS,it is necessary to identify the types and contents of the characteristic compounds of gasoline in different extraction conditions and to identify them with a variety of techniques.