1. A method of performing ion analysis comprising: performing a first analysis of a sample of ions wherein one or more parameters are scanned or ions are sorted according to one or more parameters during said first analysis; automatically determining one or more ranges of interest of said one or more parameters from said first analysis; automatically performing a second subsequent analysis of said sample of ions, wherein said second analysis is restricted to one or more of said ranges of interest of said one or more parameters by filtering out ions having values of said one or more parameters which fall outside said one or more ranges of interest, wherein said second analysis is performed at a higher resolution than said first analysis, and wherein restricting said second analysis to analysing ions having one or more ranges of interest of said one or more parameters increases a duty cycle.