Handheld Trace Explosives Sampler

Trace chemical sampling is most effective when both particles and vapor are collected due to the enhanced mass obtained. While vapor sampling is limited by the available vapor pressure of the target substance, particles are limited only by the three steps of 1) release from the surface, 2) transport to a collector/concentrator, and 3) collection efficiency for small particles. In addition, the real world problem of collecting unwanted contaminants must also be addressed. A non-contact handheld collection system is proposed that could readily be scaled to a variety of larger sampling applications. The system consists of an aerosol spray that is non-contaminating and leaves no residue, a small vortex attractor transport system capable of sampling up to a foot away, and a long life reusable collecting trap. The trap uses dynamic motion to enhance collection efficiency without sacrificing a simple cleaning method using brushing and self baking. The method of collection may employ either a default collection trap supplied with the unit or use adaptors to fit any porous collection traps commonly employed in the explosives detection industry. Alternately, a manufacturer s proprietary wiping system may be employed to wipe the chemical traces from the surface of the default trap.