Chemical Sciences: A Manual for CSIR-UGC National Eligibility Test for Lectureship and JRF/Aspirating IMS

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Example of IMS sensor.

Aspirating IMS is an ion mobility spectrometry technology used to detect low or trace quantities of chemicals in the surrounding atmosphere. It is applied in industrial and military purposes to detect harmful substances in air.


Aspiration IMS operates with open-loop circulation of sampled air. Sample flow is passed via ionization chamber and then enters to measurement area where the ions are deflected into one or more measuring electrodes by perpendicular electric field which can be either static or varying. The output of the sensor is characteristic of the ion mobility distribution and can be used for detection and identification purposes.


  • Riikka-Marjaana Räsänen, Marjaana Nousiainen, Kaleva Peräkorpi, Mika Sillanpää, Lauri Polari, Osmo Anttalainen and Mikko Utriainen. "Analytica Chimica Acta", Volume 623, Issue 1, 8 August 2008, Pages 59-65