Plotting mass‐peak profiles from selected‐ion recording data

Plotting of mass peak profiles at high mass resolution for chromatographic peaks of low ion abundance is possible from single‐ion monitoring data due to the high sensitivity and low cycle time for single‐ion monitoring. The mass profiles provide accurate masses, document mass resolution at a mass as a chromatographic peak elutes and provide relative abundances for two ions at the same nominal mass. A personal computer is used to plot the mass peak profiles.