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首页> 美国卫生研究院文献>Scientific Reports >On-site Rapid Detection of Trace Non-volatile Inorganic Explosives by Stand-alone Ion Mobility Spectrometry via Acid-enhanced Evaporization
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On-site Rapid Detection of Trace Non-volatile Inorganic Explosives by Stand-alone Ion Mobility Spectrometry via Acid-enhanced Evaporization

机译：通过酸增强蒸发的独立离子迁移谱法现场快速检测痕量非挥发性无机炸药

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摘要

New techniques for the field detection of inorganic improvised explosive devices (IEDs) are urgently developed. Although ion mobility spectrometry (IMS) has been proved to be the most effective method for screening organic explosives, it still faces a major challenge to detect inorganic explosives owing to their low volatilities. Herein, we proposed a strategy for detecting trace inorganic explosives by thermal desorption ion mobility spectrometry (TD-IMS) with sample-to-sample analysis time less than 5 s based on in-situ acidification on the sampling swabs. The responses for typical oxidizers in inorganic explosives, such as KNO3, KClO3 and KClO4 were at least enhanced by a factor of 3000 and their limits of detection were found to be subnanogram. The common organic explosives and their mixtures with inorganic oxidizers were detected, indicating that the acidification process did not affect the detection of organic explosives. Moreover, the typical inorganic explosives such as black powders, firecrackers and match head could be sensitively detected as well. These results demonstrated that this method could be easily employed in the current deployed IMS for on-site sensitive detection of either inorganic explosives or organic ones.
机译：迫切需要开发用于现场检测无机简易爆炸装置（IED）的新技术。尽管离子迁移谱法（IMS）已被证明是筛选有机炸药的最有效方法，但由于其挥发性低，检测无机炸药仍然面临着重大挑战。在本文中，我们提出了一种基于热解吸离子迁移谱法（TD-IMS）来检测痕量无机炸药的策略，该方法基于样品拭子的原位酸化，样品间分析时间少于5秒。无机炸药中的典型氧化剂（如KNO3，KClO3和KClO4）的响应至少提高了3000倍，发现其检出限为亚纳克级。检测到常见的有机炸药及其与无机氧化剂的混合物，表明酸化过程不影响有机炸药的检测。此外，还可以灵敏地检测到典型的无机炸药，例如黑火药，鞭炮和火柴头。这些结果表明，该方法可轻松应用于当前部署的IMS中，以现场敏感地检测无机炸药或有机炸药。

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