使用手持式X射线荧光光谱仪临场检测爆炸装置塑料碎片

Applying Portable X-ray Fluorescent Spectrometer to Rapidly Detect the Plastic Components from Improvised Explosive Devices

目的针对爆炸案件中常见的自制爆炸装置,建立适用于自制爆炸装置关键组件爆炸后残留塑料碎片临场快速检验的方法。方法利用手持式X射线荧光光谱仪对自制爆炸装置中51个常见塑料部件样品进行元素成分测定,采用SPSS软件的最远邻元素聚类分析法结合夹角余弦法对测定数据进行分类。结果手持式X射线荧光光谱仪测定样品元素成分具有简便快速、结果准确、无损样品的特点,采用聚类分析法分析塑料部件样品元素成分,能较好地对样品进行区分。结论该方法适合爆炸案件现场自制爆炸装置塑料碎片元素成分的的快速检验与比较。

Objective To develop a rapid on-site testing method based on elemental analysis for plastic components of improvised explosive devices (IED) involved in explosion cases.Methods The 51 plastic pieces,commonly used with IED, were determined of their elemental compositions through a portable X-ray fluorescent spectrometer,with the obtained data being classified by SPSS clustering analysis of Furthest Neighbor in combination of the approach for included angle’s cosine. Results With fast,accurate and non-destructive performance,the portable X-ray fluorescent spectrometer is able to detect the elemental compositions of plastic samples from IED so that the relating samples can be differentiated through the clustering analysis of the obtained data.Conclusion The here-developed method is useful for rapid on-site elemental determination and comparison of plastic evidential samples from IED employed in explosion cases.