Patent Document ID: 9202681
Application ID: 14251137
Patent Flag: 1

Claim One:
1. A method for performing a mass analysis of a subset of ions generated from a sample, the subset of ions comprising a restricted range mass-to-charge (m/z) ratios of the generated ions, the method comprising the steps of performing a survey mass analysis using a mass analyzer of a mass spectrometer so as to identify the restricted range of m/z ratios and to measure a flux of ions having m/z ratios within said restricted range and performing a dependent mass analysis of an optimal quantity of ions having m/z ratios within said restricted range, said optimal quantity of ions collected for a time period determined by the measured ion flux, the method CHARACTERIZED IN THAT: the time period is determined using a corrected ion flux that is calculated from the measured flux of ions, wherein the correction accounts for the use of a first mass analyzer for the survey mass analysis and a second mass analyzer for the dependent mass analysis; and the calculation of the corrected ion flux further includes a conversion factor that converts intensity measured with the first mass analyzer into intensity units of the second mass analyzer.