Identification of Gunshot Residues in Fabric Targets Using Sector Field Inductively Coupled Plasma Mass Spectrometry Technique and Ternary Graphs*
Identification of Gunshot Residues in Fabric Targets Using Sector Field Inductively Coupled Plasma Mass Spectrometry Technique and Ternary Graphs*
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DOI：
10.1111/j.1556-4029.2011.01956.x
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发表时间：
2012-03-01
影响因子：
1.6
通讯作者：
Viebig, Sonia Bocamino
中科院分区：
文献类型：
--
作者：
Freitas, Joao Carlos D.;Souza Sarkis, Jorge E.;Viebig, Sonia Bocamino
在枪支犯罪侦查中，枪弹残留的检测是最重要的证据之一。本研究描述了一种新的方法来识别在不同类型的织物中沉积在子弹入口孔周围的gsr痕迹证据。实验使用了一把0.38英寸口径的左轮手枪，以及9毫米和0.40英寸口径的手枪。在子弹入口周围切割2.25平方厘米的织物，并用10%的硝酸消化。用扇形场电感耦合等离子体质谱仪分析了剩余溶液中的锑、钡和铅。检测到的这些元素的浓度高达每平方厘米几微克。三元图形的使用使我们能够确定空白样品的具体分布模式，并明确区分所使用的左轮手枪和手枪。
During criminal investigations involving firearms, the detection of gunshot residues (GSRs) is one of the most important evidences. In the present study, a new method to identify trace evidences of GSRs, deposited around the bullet entrance hole, in different types of fabrics used as targets, is described. The experiments were carried out using a 0.38-inch caliber revolver, and 9-mm and 0.40-inch caliber pistols. Testimonies of 2.25 cm2 of the fabrics were cut around the bullet entrance and digested with 10% nitric acid. Antimony, barium, and lead were analyzed in the remaining solution using a sector field inductively coupled plasma mass spectrometer. The concentrations of the elements were detected at levels up to few microgram per square centimeter. The use of ternary graphics allowed us to identify specific patterns of distribution for blank samples and the clear distinction between the revolver and pistols used.