Characterization of organic gunshot residues in lead-free ammunition using a new sample collection device for liquid chromatography-quadrupole time-of-flight mass spectrometry
Characterization of organic gunshot residues in lead-free ammunition using a new sample collection device for liquid chromatography-quadrupole time-of-flight mass spectrometry
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DOI：
10.1016/j.forsciint.2014.11.002
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发表时间：
2015-01-01
影响因子：
2.2
通讯作者：
Barrio, Ramon J.
中科院分区：
文献类型：
--
作者：
Benito, Sandra;Abrego, Zurine;Barrio, Ramon J.
特征有机枪弹残留物 (OGSR) 的鉴定为阐明无铅弹药发射时的元素分布提供了确凿的证据。 OGSR 还可以防止漏报。为此，开发了一种基于液相色谱-四极杆飞行时间质谱（LC-QTOF）的快速有效的方法来检测和鉴定枪弹残留物（GSR）中的18种火药添加剂。使用 MS/MS 模式可确保目标分析物的明确鉴定。将拭子与覆盖有 PTFE 层的自制胶带提升支架进行比较，以确定更好的采样技术。改进的胶带提升提供了更好的萃取回收率，并能够同时分析无机和有机 GSR。所开发的方法应用于四种不同无铅弹药的 GSR 分析。所有样品中都鉴定出了二苯胺及其硝化降解产物和中心点，为 GSR 提供了有力的证据。 (C) 2014 Elsevier Ireland Ltd. 保留所有权利。
The identification of characteristic organic gunshot residues (OGSR) provides conclusive evidence in the elucidation of elemental profiles when lead-free ammunition is fired. OGSR also prevents false negatives. Toward this aim, a quick and efficient method based on liquid chromatography-quadrupole time-of-flight mass spectrometry (LC-QTOF) was developed to detect and identify 18 gunpowder additives in gunshot residues (GSR). The unequivocal identification of target analytes was assured by using MS/ MS mode. Swabs were compared with home-modified tape lift supports covered with a PTFE layer to determine the better sampling technique. The modified tape lift provided better extraction recoveries and enabled the analysis of inorganic and organic GSR simultaneously. The developed method was applied to the analysis of GSR from four different lead-free ammunitions. Diphenylamine and its nitrated degradation products and centralites were identified in all samples, providing strong evidence of GSR. (C) 2014 Elsevier Ireland Ltd. All rights reserved.