METHOD, SYSTEM AND APPARATUS FOR MULTIPLEXING IONS IN MSN MASS SPECTROMETRY ANALYSIS

摘要

A method and apparatus for multiplexing ions inan MSn mass spectrometer is provided. Ion are filtered to producea group of ions of interest, the group of ions below a space chargelimit of the MSn mass spectrometer. At least a portion of thegroup of ions are fragmented to form a fragmented group of ions.At least a portion of the fragmented group are stored such that aplurality of portions of the fragmented group can be sequentiallyselected for mass spectrometry analysis. Each of the plurality ofportions of the fragmented group are sequentially selected andrefragmented prior to mass spectrometry analysis. Each of the pluralityof portions of the fragmented group are analyzed, via massspectrometry, once each of the plurality of portions of thefragmented group has been fragmented.