Abstract

European Journal of Mass Spectrometry
Volume 15 Issue 2, Pages 343–348 (2009)
doi: 10.1255/ejms.989

Application of effective potential approach to ion dynamics investigation in field asymmetric ion mobility spectrometry conditions

Eugene N. Nikolaev^a,* and Alexander A. Vedenov^b
aThe Institute for Energy Problems of Chemical Physics, Russian Academy of Sciences, Leninskij pr.38 k.2, Moscow 119334, Russia. E-mail: ennikolaev@rambler.ru
^bKurchatov Institute for Atomic Energy, Ulitsa Kurchatova 46, Moscow 123182, Russia

The theory of ion motion in field asymmetric ion mobility spectrometry (FAIMS) conditions has been developed on the bases of an effective field approach and applied to cylindrical and spherical geometries of FAIMS analyzers. The resulting analytical formulae relate compensation voltage to ion characteristics such as non-linear ion mobility coefficient, ion mobility and ion mass and charge. They permit taking into account ion inertia at small pressure of a buffer gas and at high ion mass.

Keywords: ion mobility, FAIMS, pseudopotential

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