METHOD OF MASS ANALYSIS OF IONS IN QUADRUPOLAR HIGH-FREQUENCY FIELDS WITH DIPOLE EXCITATION OF OSCILLATIONS ON BORDERS OF STABILITY

摘要

FIELD: physics.;SUBSTANCE: invention relates to the field of mass spectrometry and can be used to improve the analytical, operational and commercial characteristics of microanalysis devices for a substance, using the properties of ion motion trajectories in electric fields. Method of mass analysis with resonant excitation of oscillations of ions is characterized in that the frequency of the exciting field is chosen equal to the frequency of one of the harmonics of the oscillations of ions at the boundaries of the Mathieu stability diagram, and the mass sweep is carried out by the time variation of the constant component of the quadrupole field with the constancy of the parameters of its high frequency component. Method allows to increase the resolution and sensitivity, to expand the range of the analyzed mass and to increase the speed of analysis of quadrupole mass spectrometers with resonant output of ions.;EFFECT: resolution enhancement, improvement of high-frequency power supply systems, excitation and scanning of quadrupole mass analyzers with resonant ion output.;1 cl