THE EFFECTIVENESS OF A JET DISRUPTOR TO PREVENT THE NON-EVAPORATED DROPLETS FROM PASSING THROUGH THE INLET INTERFACE OF THE MASS SPECTROMETER

The paper presents the results of modeling the motion of non-evaporated droplets (from an electrospray ionization source) entering the input interface of a mass spectrometer through a capillary. The interface is a radio frequency ion funnel with a jet disruptor, which is a disk plate located on the axis of the funnel behind the capillary. It is shown that when matching the parameters of the output jet with the size of the disk, the nonevaporated droplets with a diameter of 0.1–10 microns effectively deflect sideways along with the gas flow and thus do not spread further along the ion path, that contributes to a significant reduction in the noise level in the mass spectrum.