Roberts Marcel, Petraco Nicholas, Gittings Michael
John Jay College of Criminal Justice, City University of New York, United States.
Sci Justice. 2015 Dec;55(6):467-71. doi: 10.1016/j.scijus.2015.08.001. Epub 2015 Sep 16.
Nitroglycerin is an active component in many explosive substances. Notably, it is found as an active ingredient in double-base smokeless powders, differentiating them from single-base powders, whose main active ingredient is nitrocellulose. It is proposed that the detection of nitroglycerin within various types of ammunition will allow for the differentiation between single and double-base smokeless powders, thus allowing for a method of distinguishing ammunition or bulk powder samples that may be found during the course of a criminal investigation. Presumptive tests are an effective tool in field-testing for forensic science. These tests are used primarily as rapid, sensitive means of elucidating the chemical characteristics of an unknown sample in-situ. In this paper, the authors present a novel method for the detection of nitroglycerin in smokeless powders with the use of a presumptive color test reagent, dimethylaminocinnamaldehyde (p-dmac). Twenty-five smokeless powders were tested using this reagent to evaluate the color change that would occur in the presence of nitroglycerin. All presumptive results were confirmed via gas chromatography-mass spectrometry.
硝酸甘油是许多爆炸物中的活性成分。值得注意的是，它是双基无烟火药中的活性成分，这使其与主要活性成分为硝化纤维素的单基火药有所不同。有人提出，检测各类弹药中的硝酸甘油将有助于区分单基和双基无烟火药，从而提供一种在刑事调查过程中区分可能发现的弹药或散装火药样本的方法。推定测试是法医科学现场测试中的一种有效工具。这些测试主要用作快速、灵敏的手段，以就地阐明未知样品的化学特性。在本文中，作者提出了一种使用推定颜色测试试剂二甲基氨基肉桂醛（p-dmac）检测无烟火药中硝酸甘油的新方法。使用该试剂对25种无烟火药进行了测试，以评估在有硝酸甘油存在时会发生的颜色变化。所有推定结果均通过气相色谱-质谱法得到证实。
