Illustration of the entire data set of a ZoomWalking experiment

A "map" display of the entire data file of a zoomscan walk experiment performed on a real sample. There are several neat things about this illustration. First of all the x/y axis are displaying m/z and time. Color is used to indicate intenstity. The scale for intensity forces the full-scan and zoom data to display as red or bright blue mainly. The experiment begins on the left and continues to the right. At time 0 the zoomwalk is looking in the 500 amu region for candidates for MS/MS. These MS/MS experiments cover a wide mass range while the zoom and full-scan data focus on a narrow (10amu) range. This is what produces the red curve across the picture. The slope of the curve is related to the speed required to fill the trap for the MS/MS stages mainly. The slope is steeper when there are plenty of ions around and it requires less time to fill the trap. The width of the "bands" in the illustration is also an indication of the length of time required to fill the trap. A quick look shows that the more intense MS/MS spectra also tend to have thinner bands and the faint ones are fatter. The choice of charge state is also apparent as all +2 ions should have a data recorded above and below the parent mass which lies on the red line. The "1/3 rule" low mass cut-off also is visible in the data set as the lower limit of the MS/MS spectra which tends to slowly increase with the parent mass as well.