局痕迹爆炸物蒸汽检测在米距离上的距离
Megan K Nims1, Elizabeth H Denis2, Garret L Hart1
1Pacific Northwest National Laboratory, 902 Battelle Boulevard, P.O. Box 999, MSIN P7-50, Richland, WA 99352, USA.
Talanta
|December 30, 2023
概括
这项研究表明,大气流管质谱法 (AFT-MS) 可以在几米外探测微量爆炸物蒸汽. 这种非接触式方法为安全查提供了一种不那么侵入性的方法.
科学领域:
- 分析化学 分析化学
- 化学工程是化学工程的重要组成部分.
- 法医科学 法医科学 法医科学
背景情况:
- 爆炸物蒸汽检测对于安全至关重要,但由于蒸汽度低,具有挑战性.
- 目前的方法,如物理扫描,是侵入性的,可能会错过微量.
- 非接触式蒸汽检测提供了一个不那么侵入性的,可能更敏感的替代方案.
研究的目的:
- 为了证明大气流管质谱法 (AFT-MS) 对痕迹爆炸物蒸汽的对峙检测的能力.
- 为了评估AFT-MS与大容量空气采样器相结合可以实现的灵敏度和对峙距离.
- 探索这项技术在安全查中的潜在应用.
主要方法:
- 使用大气流管质谱法 (AFT-MS) 使用大容量空气采样仪.
- 使用爆炸物蒸汽来源 (RDX,酸甘油残留物) 进行了对峙检测实验.
- 研究了不同距离和相对于空气流的探测能力.
主要成果:
- 实现了爆炸物蒸汽检测的千亿分之一的灵敏度.
- 已证明可以检测到RDX蒸汽的距离高达2.5米,残留蒸汽的距离高达0.5米.
- 在蒸汽源的上游和下游确认成功检测,不管房间的空气流如何.
结论:
- 配备大容量采样器的 AFT-MS 能够有效地检测微量爆炸物蒸汽.
- 该技术提供了一种敏感的,非接触式的爆炸物查方法.
- 潜在的应用包括邮政设施,边境口岸和检查站的安全查,检查爆炸物,毒品和化学威胁.
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