FIELD: mass spectrometry. SUBSTANCE: in process of sorting of charged particles in hyperboloid mass spectrometer of ion trap type constant component and/or high-frequency component, and/or frequency, and/or relative pulse duration, and/or shape of pulse are/so changed by pulse to obtain at least once during time of sorting transfer of working point of analyzed particles on graph of solution of Hill's equations along one of coordinates from one boundary of stability zone to another. EFFECT: enhanced sensitivity of method, improved resistance to presence of field distortions. 7 dwg
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