火灾调查中助燃剂烟尘的提取分析  

Accelerant Soot Extraction Analysis in Fire Investigation

作　　者：支有冉[1,2] 宗若雯[1,2] 曾文茹[1] 李飞[1] 赵威风[1,2] 谭家磊[3] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230026 [2]中国科学技术大学苏州研究院苏州市城市公共安全重点实验室,苏州215123 [3]北京市劳动保护科学研究所,北京100054

出　　处：《燃烧科学与技术》2011年第5期461-468,共8页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(50974110);苏州市科技计划(应用基础研究计划)资助项目(SYJG0911)

摘　　要：通过对完全敞开燃烧条件下的汽油烟尘进行不同温度下的固相微萃取实验研究,发现高温萃取的效果优于低温萃取,并确定了固相微萃取的萃取平衡温度为70,℃.对完全敞开燃烧和半封闭状态下燃烧的汽油烟尘进行气相色谱-质谱联用仪对比分析,发现半封闭燃烧烟尘中的多环芳烃特征物质种类更丰富.通过对保存时间不同的烟尘进行对比分析,发现长时间保存的烟尘检测出的主要物质不变,而最大丰度值明显降低.最后通过汽油和柴油两种不同的助燃剂烟尘的固相微萃取-气相色谱-质谱联用技术分析检测,比较了助燃剂种类对于烟尘特征物质的影响,包括多环芳烃物质种类,以及特征物质出峰时间的显著区别.The SPME extraction of the gasoline soot generated under full open combustion is conducted at different temperature. It is found that the effectiveness of SPME extraction at high temperature is better than that at low temperature and the equilibrium temperature for SPME extraction is 70℃.The GC-MS analysis indicates that the gasoline soot generated under semi-closed combustion contains more diversified target compounds, i.e. the polycyclic aromatic hydrocarbons than that generated under full open combustion. Furthermore, a comparative analysis is made on a se- ries of gasoline soot with different storing time. It is found that the target compounds of the soot with longer storing time remain almost unchanged, while the maximum abundance is significantly reduced. Finally, the impact of different accelerants on the target compounds of soot including types of PAHs and retention time, is elucidated through the SPME-GC-MS analysis of the soot generated by two different accelerants namely gasoline and diesel.

关 键 词：助燃剂烟尘 固相微萃取 萃取平衡温度 多环芳烃 

分 类 号：X9[环境科学与工程—安全科学]