Method for Measuring Gases and Corresponding Ion Mobility Spectrometer

摘要

The invention relates to a method and device for measuring gaseous substances, in which the method comprises the stages: - ionization of the sample gas in a gas flow (10), - leading of the ionized gas flow through an elongated ion-mobility measuring chamber (12) in the cross-section defined by it, - filtering out (14) of ions from the ionized gas flow at a distance from the measuring electrodes (ex, e2, e3), permitting the passage of only the ions travelling from the flow cross-section at the selected point, - separation of ions (J