汽油中苯系萘系成分固相微萃取性能研究  

Extraction capability probe on benzene and naphthalene series ingredients in gasoline samples

作　　者：范子琳[1] 田桂花[1] 李剑[2] 鲁志宝[1] 

机构地区：[1]公安部天津消防研究所,天津300381 [2]天津市消防总队,天津300090

出　　处：《消防科学与技术》2016年第11期1642-1645,共4页Fire Science and Technology

基　　金：公安部消防局重点攻关项目"易燃液体实验室鉴定准确性影响因素研究"(2013XFGG04)

摘　　要：采用固相微萃取法(SPME)对汽油中苯系和萘系5类特征成分在不同萃取温度和不同萃取时间条件下的萃取效果变化规律及其原因进行研究。通过测定汽油中苯系物(C2苯、C3苯和C4苯)和萘系物(萘和甲基萘)的原始相对体积分数,与固相微萃取法萃取到的成分的相对体积分数进行对照分析。结果表明:随温度升高,汽油总萃取量下降;随时间延长,汽油总萃取量增加,但汽油中苯系和萘系5类特征成分的萃取规律并非均与总萃取量变化趋势保持一致。该结论为不同萃取条件的谱图分析比较、评价汽油固相微萃取提取方法的优劣以及实际火灾物证鉴定中汽油存在与否的准确判断提供参考。Solid-phase microextraction （SPME） is used to extract benzene and naphthalene series ingredients in gasoline samples. The different extraction temperatures and extraction times were studied. The original relative percentage of benzene and naph thalene series ingredients in gasoline was used to compare with the results obtained by solid-phase microextraction. The results showed that the extraction amount of total gasoline in probe de creased with increasing of extraction temperature, and increased with increasing of extraction time. But the extraction trends of benzene and naphthalene series ingredients were not keeping in line with that of total gasoline. This study could be used for comparison of chromatograms, evaluation of extraction technology, and judgment of gasoline in fire debris samples.

关 键 词：固相微萃取 汽油 苯系物 萘系物 萃取温度 萃取时间 火灾物证鉴定 火灾调查 

分 类 号：X928.7[环境科学与工程—安全科学] TU998.12[建筑科学—市政工程]