SPME/GC-MS在对火场残留物分析中的应用及其数据分析  

Application of SPME/GC-MS in the analysis of fire debris and its data interpretation

作　　者：查正根[1] 宗若雯[1] 李松阳[1] 王荣辉[1] 曾文茹[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室

出　　处：《火灾科学》2007年第2期115-121,共7页Fire Safety Science

基　　金：中国科学技术大学火灾科学国家重点实验室开放课题(HZ2005-KF10);国家自然科学基金(10605023)

摘　　要：本文利用固相微萃取(SPME)的高富集性和气相色谱-质谱(GC-MS)的精确性,采用SPME/GC-MS方法对模拟纵火现场中的常见火灾残留物进行分析,并通过比较其特性化合物,很大程度上提高了判断的准确性。利用二甲基苯、三甲基苯、四甲基苯及甲基萘类化合物各自异构体的特征比值,可以很好地减少分析过程中背景干扰。通过向量夹角法进行相似度分析可以帮助判断干扰物的影响。For the high enrichment of Solid Phase Micro-extraction （SPME） and the high precision of Gas Chromatography/ Mass Spectrometry, SPME/GC-MS was used in the analysis of some common fire debris that was taken from a simulated arson scene. The presence of gasoline can be identified accurately by comparing some target compounds. With the help of the diag- nostic ratio of the area of 2-Methylbenzene,3-Methylbenzene, 4-Methylbenzene, Methylnaphthalene and their relevant isomers, the interference of background in analysis can be reduced. The Similarity Analysis by vectorial angel method showed the effect of interference matrices.

关 键 词：固相微萃取 气相色谱-质谱 火灾残留物 汽油 相似度分析 

分 类 号：X928.19[环境科学与工程—安全科学]