MULTI-DIMENSIONAL SURVEY SCANS FOR IMPROVED DATA DEPENDENT ACQUISITIONS

摘要

A method of analysing ions is disclosed comprising performing an initial multi- dimensional survey scan comprising separating parent ions according to a first physico- chemical property (e.g. ion mobility) and then separating the parent ions according to a second physico-chemical property (e.g. mass to charge ratio). A plurality of parent ions of interest are then determined from the initial multi-dimensional survey scan. Once parent ions of interest have been determined, the plurality of parent ions of interest are sequentially selected based upon the first and second physico-chemical properties during a single cycle of separation. The parent ions of interest may then be fragmented and corresponding fragment ions may then be mass analysed.