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Ion Mobility Spectrometry (IMS) is a well-known, sensitive and rapidtechnique to detect dangerous organic compounds. We propose a system in which acrown type discharge generates a ionic flow that is swept towards an array ofcollectors by a transverse electric field. The ions are separated as they enterthe cell according to their mobility. Thus, the distribution of the chargedeposited at the detector assembly constitutes a {\em fingerprint} for eachorganic compound. Simulations of our cell and experiments were performed forsmall amounts of acetone, ethanol and toluene. The dependence on the cellparameters of the current and charge versus time of flight was analyzed. Oursimulation reproduces only qualitatively the experimental results. However, aPCA statistical analysis of the results obtained by simulation of the proposeddesign shows that the fingerprint is useful for a clear identification of suchcompounds.

Development of an IMS Type Device for Volatile Organic Compunds Detection: Simulation and Comparision of the Ion Distributions