钢锤打击后皮肤遗留金属颗粒成分检测

Inspection of Left Metal Particles on Skin Impacted by the Steel Hammers

目的应用扫描电镜-X射线能谱仪(scanning electron microscope and energy dispersive X-ray spec-trometer,SEM-EDX)对钢锤打击猪皮和滤纸遗留金属颗粒进行元素成分分析,为钝器致伤工具推断研究建立方法。方法使用两把不同的钢锤分别打击猪皮和滤纸,应用SEM-EDX检测遗留金属颗粒,利用SPSS13.0对检测结果进行统计分析。结果同一把钢锤多次打击遗留颗粒成分特征稳定,打击猪皮和滤纸遗留颗粒成分差异无统计学意义,两把成分不同的钢锤遗留颗粒成分差异有统计学意义。结论 SEM-EDX可以对钢锤遗留的颗粒进行成分检验,为法医学致伤物推断提供新的途径。

Objective To establish a new method to estimate injury-tool by analyzing the components of left metal particles from hammers impact on pig skin and filter paper using scanning electron microscope and energy dispersive X-ray spectrometer （SEM-EDX）. Methods The pig skin and filter paper were stricken by two steel hammers. The left metal particles were examined by SEM-EDX and the results were statistically analyzed by SPSS 13.0. Results The characteristics of left particles showed stable by several impacts using one steel hammer. The left particles showed no statistical difference for impact on pig skin and filter paper. The left particles displayed a statistical difference using two hammer with different com- ponents. Conclusion SEM-EDX can be used to detect the left metal particles from the steel hammer and can provide a method for estimating injury-tool .