Detection and Classification of Explosive Compounds in Presence of Interferents Utilizing Laser Ion Mobility Spectrometry

摘要

Ion Mobility Spectrometers (IMS) are frequently used to screen airline passengers and their luggage for explosives and explosive by-products. Traditionally, in IMS technology different kinds of molecules are distinguished on account of their different ion mobilities in a weak electric field. In this paper we report on methods of resolution enhancement applicable to IMS drift time spectra. We find that a robust classification of irate explosives can be obtained by algorithmic resolution enhancement of the raw drift time spectra and by an additional parameterisation of the desorption function of the sampled explosives.