期刊
TALANTA
卷 249, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.talanta.2022.123653
关键词
Explosives; Chemical ionization mass spectrometry; Screening
资金
- Business Finland [3920/31/2016]
- Academy of Finland [1325656, 346370, 296628]
- European Research Council (ERC)
- European Union [714621]
- Academy of Finland (AKA) [296628, 296628] Funding Source: Academy of Finland (AKA)
Illegal explosives pose a threat to public safety, aviation, transportation, and critical infrastructure. Researchers have developed a trace explosives detection instrument with high sensitivity and efficient workflows. The instrument utilizes thermal desorption of filters for the analysis of liquid and solid phase samples, followed by selective atmospheric pressure chemical ionization and detection with a mass spectrometer. The experiments demonstrated that the system has low detection limits and can effectively detect various common explosives.
Illegal explosives are a threat to aviation, transport sector, critical infrastructure and generally to public safety. Their detection requires extremely sensitive instruments with efficient workflows that allow large throughput of items. In this study, we built a trace explosives detection instrument that requires minimal sample treatment and reaches ultra-low picogram level detection limits for many common explosives. The instrument is based on thermal desorption of filters, which allows analysis of liquid and solid phase samples, and subsequent selective atmospheric pressure chemical ionization and detection with a mass spectrometer. We performed experiments to scope the optimal ionization chemistry for the system and selected Br- as the reagent ion, and measured the limit of detection for 14 different explosives that were generally in the picogram range. Finally, we demonstrate the usability of the system by sampling air to a filter from a storage room known to contain explosives, from which we detect four different explosives.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据