便携式X射线荧光光谱分析仪快速检测弹着痕迹  

Using Portable X-ray Fluorescent Spectrometry to Rapidly Test the Impact Marks at Gunshot Spot

作　　者：庄岩 王晓琳[2] 郭威 梅宏成[2] ZHUANG Yan;WANG Xiaolin;GUO Wei;MEI Hongcheng(School of Criminal Science and Technology,People’s Public Security University of China,Beijing 100038,China;Institute of Forensic Science,Ministry of Public Security,Beijing 100038,China)

机构地区：[1]中国人民公安大学刑事科学技术学院,北京100038 [2]公安部物证鉴定中心,北京100038

出　　处：《刑事技术》2019年第3期246-249,共4页Forensic Science and Technology

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(No.2017JB014)

摘　　要：目的探究便携式X射线荧光光谱分析仪快速检测纺织物客体上弹着痕迹的技术。方法选用QSZ92式9mm手枪,在不同距离射击白色纯棉布,制作48个弹着痕迹样本。用仪器检测弹着痕迹样本上的射击残留物,统计分析检测数据。结果仪器在塑料模式下以检测时间90s对利用QSZ92式9mm手枪制作的纺织物弹着痕迹样本中Sb、Sn、Pb、Cu、Zn元素具有良好的检测效果。其中,Sn、Sb元素在射击距离大于等于50cm的样本上无法被同时检出。结论便携式X射线荧光光谱仪适用于纺织物上弹着痕迹的临场检测,检测结果对推断射击距离有一定参考价值。Objective To explore a technical method for testing the impact marks (left from gunshot residue) on textile materials with portable X-ray fluorescent spectrometer.Methods Chinese Norinco QSZ92 9mm pistols were selected to shoot white cloth fabrics at six shooting distances (cm) of 15,25,50,100,300 and 500,having 48 impact marks made.One portable X-ray fluorescent spectrometer was used to test the gunshot residue on the impact marks,with the testing data collected for statistical analysis.Results The portable X-ray fluorescent spectrometer,set the test time of 90s under plastic mode,showed effectual on detecting the elements of Sn,Sb,Pb,Cu and Zn from the impact marks left with shooting Chinese Norinco QSZ92 9mm pistols.Sn and Sb elements can be detected at the same time within the shooting distance of 25cm (including 25cm), yet none for the distance of 50cm (including 50cm) and greater.Conclusions The portable X-ray fluorescent spectrometer is suitable for gunshot spot test by the impact marks on the textile materials,with the test results having referential value for inferring the shooting distance.

关 键 词：纺织物 弹着痕迹 射击残留物 射击距离 临场检测 便携式XRF分析仪 

分 类 号：DF794.1[政治法律—诉讼法学]