不同载体上汽油及其燃烧残留物的SPME-GC/MS检测

SPME-GC/MS Detection of Gasoline and its Combustion Residue on Different Carriers

汽油作为火灾现场常见的助燃剂,不同载体会对汽油及其残留物组分产生影响。本研究采用SPME-GC/MS检测方法,选用薄木片、瓦楞纸、聚乙烯PE、棉毛纤维、乙腈手套作为载体,通过优化前萃取时间和热脱附时间,采用峰面积归一化法进行燃烧残留物组分含量的分析。结果表明:五种载体本身的燃烧残留物成分与汽油特征组分不一致,而且不同载体的汽油燃烧残留物的组分存在差异。

Gasoline,as a common combustion promoter at fire scenes,can be influenced by different carriers and their residual components.In this study,a SPME-GC/MS detection method was employed,and thin wood chips,corrugated paper,polyethylene(PE),cotton fibers,and acetonitrile gloves were selected as carriers.By optimizing the pre-extraction time and thermal desorption time,the peak area normalization method was used to analyze the content of combustion residues.The results showed that the combustion residue components of the five carriers themselves were inconsistent with the characteristic components of gasoline,and there were differences in the composition of gasoline combustion residues among different carriers.