摘要
目的建立火场中汽油燃烧残留物ATD-GC-MS检验结果评价方法。方法将模拟燃烧样品用ATD-GC-MS法检验,检验结果通过对芳烃、烷烃、茚满、和萘系列的4个特征离子色谱图与已知汽油作比较,并利用向量夹角法计算样品与汽油色谱指纹图的相似度来对检验结果作评价。结果有汽油作助燃剂的模拟燃烧样品与汽油色谱指纹图的相似度一般大于90%,无汽油作助燃剂的样品则在60%以下。结论利用样品的4个特征离子色谱图与已知汽油作比较,并结合样品与汽油色谱指纹图相似度的计算,能对检验结果作出客观、可靠和准确的评价。
Objective To establish a method for evaluating the ATD-GC-MS analysis results of gasoline residues in fire debris samples. Methods Simulate＆burning samples were analyzed with ATD-GC-MS, the extracting characteristic ions chromatogram of aromatics, alkanes, indane and naphthalene were compared with chromatogram of gasoline, and then the similar-degree of the fingerprint chromatogram of fire debris samples and the gasoline using vectorial angle method were calculated. Results Generally, the similar-degree were larger than 90% for the fire debris samples which with gasoline as accelerant, less than 60% for the fire debris samples which without gasoline as accelerant. Conclusion The objective, reliable and accurate evaluation can be made for the ATD-GC-MS analysis results by using the comparison of the four characteristic ions chromatogram of fire debris samples with chromatogram of gasoline, and with the similar-degree calculation of the chromatograms of the fire debris samples and gasoline at the same time.
出处
《刑事技术》
2012年第1期6-10,共5页
Forensic Science and Technology
基金
广州市科技攻关项目(No.2007Z1-E0062)
