扫描电镜/X射线能谱仪/X射线波谱仪组合检测射击残留物

Testing shooting residues by combined SEM/EDS/EDW method

在司法物证检验中,通常采用扫描电镜/X射线能谱仪自动检测枪击案件中的射击残留物。但在检出的可疑颗粒物中,经常遇到硫(S)、锑(Sb)元素含量偏低的情况,用X射线能谱仪很难认定该颗粒物就是射击残留物。本文采用了扫描电镜/X射线能谱仪/X射线波谱仪组合方法,能检测出射击残留物中的S和Sb元素,弥补了X射线能谱仪的不足。这种组合形式,能够在微量物证检验工作中发挥很好的作用。

In judicial material evidence testing, the SEM/X-ray EDS is usually used for the detection of shooting residues from a gun shooting case. But if the contents of S and Sb elements in suspicious particles are too low to be detected by X-ray EDS, it is very difficult to recognize that these particles are shooting resides. In this paper, a combined SEM/X-ray EDS/X-ray EDW method is used to analyze the shooting residuces. The new method is able to identify S and Sb elements and compensate the shortcomings of X-ray EDS. This method can play an important role in testing trace material evidence.