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首页> 外文期刊>Microchemical Journal: Devoted to the Application of Microtechniques in all Branches of Science >Gunshot residues (GSR) analysis of clean range ammunition using SEM/EDX, colorimetric test and ICP-MS: A comparative approach between the analytical techniques
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Gunshot residues (GSR) analysis of clean range ammunition using SEM/EDX, colorimetric test and ICP-MS: A comparative approach between the analytical techniques

机译：使用SEM / EDX，比色测试和ICP-MS分析纯净距离弹药的枪械残留物（GSR）：分析技术之间的比较方法

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Inductively coupled plasma mass spectrometry (ICP-MS) is a powerful tool for a rapid analysis of chemical elements due to its high sensitivity, selectivity and multi-elemental character. Herein, the ability of the ICP-MS technique is evaluated to determine the gunshot residues (GSR) from clean range ammunition using a 0.40 caliber pistol and a 0.38 caliber revolver as a function of number of shots (n = 1-7 shots for the pistol and n = 1-5 shots for the revolver). The GSR was collected on the two regions of right and left hands: thumb and forefinger palm and thumb and forefinger back. ICP-MS results were compared to classical techniques in the forensic ballistics: the colorimetric test using sodium rhodizonate reagent and scanning electron microscope with energy dispersive X-ray spectrometry (SEM/EDX). Negative results were found for Pb and Ba using the colorimetric test from GSR with n = 7 shots from 0.40 caliber pistol. For SEM/EDX analysis, photomicrographs show indefinite morphology for the GSR of clean range ammunition, in contrast to reported by conventional GSR. Moreover, the EDX results primarily identified C, O, K, Al, S, Si, Cu, Zn, Ti, Cr, Cl, Mo, Sr, and Fe. Differently, ICP-MS provided positive results for Pb, Ba and Sb, with maximum concentrations of 420 mu g.L-1, 10.9 mu g.L-1 and 0.119 mu g.L-1, respectively, as well as for Al, Ti, Cr, Mo, Cu, Zn and Sr. Finally,Al, Zn, Cu and Sr can be used as new markers of GSR of clean range ammunition, since they are the most abundant species detected. (C) 2016 Published by Elsevier B.V.
机译：电感耦合等离子体质谱法（ICP-MS）具有高灵敏度，选择性和多元素特征，因此是快速分析化学元素的强大工具。在此，使用0.40口径手枪和0.38口径左轮手枪，将ICP-MS技术的能力评估为从净程弹药中确定枪支残留物（GSR），作为枪支数量的函数（n = 1-7枪手枪，n = 1-5发左轮手枪）。 GSR收集在左右手的两个区域：拇指和食指手掌以及拇指和食指后背。 ICP-MS的结果与法医弹道学中的经典技术进行了比较：比色法测试使用了Rhodizonate试剂和扫描电子显微镜以及能量色散X射线光谱仪（SEM / EDX）。使用GSR的比色测试，从0.40口径手枪中得到n = 7发子弹，发现Pb和Ba阴性。对于SEM / EDX分析，与常规GSR所报道的相比，显微照片显示的是近程弹药GSR的不确定形态。此外，EDX结果主要确定了C，O，K，Al，S，Si，Cu，Zn，Ti，Cr，Cl，Mo，Sr和Fe。 ICP-MS分别提供了铅，钡和锑的阳性结果，最大浓度分别为420μgL-1、10.9μgL-1和0.119μgL-1，以及Al，Ti，Cr，Mo最后，Al，Zn，Cu和Sr可以作为近距离弹药GSR的新标记，因为它们是检测到的最丰富的物种。 （C）2016由Elsevier B.V.发布

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