In-situ detection of single particles of explosive on clothing with confocal Raman microscopy.
In-situ detection of single particles of explosive on clothing with confocal Raman microscopy.
复制标题
DOI：
10.1016/j.talanta.2008.12.038
复制
发表时间：
2009-05
期刊：
影响因子：
6.1
通讯作者：
E. M. A. Ali;H. Edwards;I. Scowen
中科院分区：
文献类型：
--
作者：
E. M. A. Ali;H. Edwards;I. Scowen
共聚焦拉曼显微镜显示可以在未染色的天然和合成纤维以及有色纺织品标本上检测到picg数量的爆炸物，而可能的证据材料未被改变。拉曼光谱由捕获在样品纤维之间的四硝酸季戊四醇（PETN）、三硝基甲苯（TNT）和硝酸铵颗粒获得。尽管天然和合成聚合物以及染色纺织品存在光谱带，但爆炸性物质可以通过其特征拉曼带进行识别。此外，从捕获在高荧光服装纤维之间的炸药颗粒中获得了拉曼光谱。在最大尺寸为5 ~ 10μm的炸药颗粒上采集拉曼光谱。在没有样品制备的情况下，很容易在90年代内原位获得染色和未染色衣服基底上的爆炸物光谱。
Confocal Raman microscopy is shown to detect picogram quantities of explosives in-situ on undyed natural and synthetic fibres, and coloured textile specimens leaving potentially evidential materials unaltered. Raman spectra were obtained from pentaerythritol tetranitrate (PETN), trinitrotoluene (TNT), and ammonium nitrate particles trapped between the fibres of the specimens. Despite the presence of spectral bands arising from the natural and synthetic polymers and dyed textiles, the explosive substances could be identified by their characteristic Raman bands. Furthermore, Raman spectra were obtained from explosives particles trapped between highly fluorescent clothing fibres. Raman spectra were collected from explosives particles with maximum dimensions in the range 5–10μm. Spectra of the explosives on dyed and undyed clothing substrates were readily obtained in-situ within 90s and without sample preparation.