EADS Innovation Works Germany, EADS Deutschland GmbH, D-81663 München, Germany.
Talanta. 2012 Jan 30;89:441-7. doi: 10.1016/j.talanta.2011.12.059. Epub 2011 Dec 28.
Detection of trace explosives residues at people and cargo control points has become a key security challenge. A severe obstacle is that all commercial and military high explosives have low to extremely low vapor pressures which make them very hard to detect. With detectable vapors not being present, explosives detection needs to proceed through a series of sequential steps including particle collection, thermal vapor conversion and vapor detection. The present paper describes the design and test of an electrostatic particle precipitator which allows particle residue to be collected from the environment, the collected particle residue to be separated into high- and low-electron affinity fractions and the high-electron-affinity one to be concentrated onto a small-area collector surface for later vaporization. The selectivity of this particle collection and separation process is demonstrated and a full-chain demonstration of a DNT detection experiment is presented (DNT: di-nitro-toluene).
在人员和货物检查站检测痕量爆炸物残留物已成为一个关键的安全挑战。一个严重的障碍是，所有商业和军用高爆炸物的蒸汽压都很低，甚至极低，这使得它们很难被检测到。由于没有可检测的蒸汽，爆炸物检测需要通过一系列连续的步骤进行，包括颗粒收集、热蒸汽转化和蒸汽检测。本文描述了一种静电颗粒沉降器的设计和测试，该沉降器允许从环境中收集颗粒残留物，将收集到的颗粒残留物分离成高电子亲和力和低电子亲和力两部分，并将高电子亲和力部分浓缩到小面积的收集器表面上，以便以后进行蒸汽化。本文展示了这种颗粒收集和分离过程的选择性，并呈现了一个完整的 DNT 检测实验演示（DNT：二硝基甲苯）。
