基于电感耦合等离子体-质谱法的射击残留物检验方法研究  

Research on the Detection Method of Gunshot Residues Based on Inductively Coupled Plasma Mass Spectrometry

作　　者：李想[1] 于遨洋[1] 朱昱[1] LI Xiang;YU Aoyang;ZHU Yu(Criminal Investigation Police University of China,Shenyang 110035,China)

机构地区：[1]中国刑事警察学院,辽宁沈阳110854

出　　处：《中国人民公安大学学报（自然科学版）》2021年第4期1-4,共4页Journal of People’s Public Security University of China(Science and Technology)

基　　金：公安部技术研究计划项目(2019JSYJC24);公安部科技强警基础工作专项项目(2019GABJC06)。

摘　　要：提出了采用电感耦合等离子体质谱(ICP-MS)检测射击残留物分析的方法。建立了射击残留物中Pb、Ba、Sb、Sn元素同时检测的方法。用77式手枪进行射击实验,采集射击者手上和被射击布上射击残留物并进行样品前处理,选择优化ICP-MS分析条件,采用铼标准溶液作为内标,用标准曲线法测定了射击残留中Pb、Ba、Sb、Sn元素含量。研究结果表明ICP-MS检测射击残留物的方法灵敏度高,分析物检出限均小于1μg/L,可满足射击残留物的司法鉴定要求。This paper proposes a method for the detection of gunshot residues using inductively coupled plasma mass spectrometry(ICP-MS).By using this method,simultaneous detection of Pb,Ba,Sb and Sn elements in gunshot residues could be realized.The shooting experiment was carried out with type 77 pistol.The gunshot residues left on shooter's hands and shot cloth were collected and pretreated.The ICP-MS analysis conditions were optimized,the Re standard solution was used as the internal standard,and the contents of Pb,Ba,Sb and Sn in the gunshot residues were determined by the standard curve method.The results showed that the ICP-MS method was highly sensitive and the detection limit was less than 1μg/L,which could meet the requirements of forensic identification of gunshot residues.

关 键 词：射击残留物 手枪 电感耦合等离子体质谱 

分 类 号：D918.93[政治法律—法学]