High-throughput walkthrough detection portal for counter terrorism: detection of triacetone triperoxide (TATP) vapor by atmospheric-pressure chemical ionization ion trap mass spectrometry

摘要

With the aim of improving security, a high-throughput portal system for detecting triacetone triperoxide (TATP) vapor emitted from passengers and luggage was developed. The portal system consists of a push-pull air sampler, an atmospheric-pressure chemical ionization (APCI) ion source, and an explosives detector based on mass spectrometry. To improve the sensitivity of the explosives detector, a novel linear ion trapmass spectrometerwithwire electrodes (wire-LIT) is installed in the portal system. TATP signals were clearly obtained 2s after the subject under detection passed through the portal system. Preliminary results on sensitivity and throughput showthat the portal systemis a useful tool for preventing the use of TATP-based improvised explosive devices by screening persons in placeswhere many people are coming and going.