Analyst Software Reference Guide - AB Sciex

Software Reference GuideFigure 1-10 Finding the peak end: case 1 (Continued)Item Description2 Peak end3 Does not exceed noise threshold1Figure 1-11 Finding the peak end: case 2Item Description1 Peak endSeparating PeaksIf a new peak begins before the current peak hits the baseline, the software decides, based onthe following criteria, whether to resolve the baseline by using exponential skims. The skimpasses under one or more peaks that follow the precursor. These peaks are called productpeaks.When the software performs an exponential skim, it subtracts the area underneath the skim fromthe product peaks and gives it to the precursor peak. It then subtracts the small area above theskim from the precursor peak and adds it to the first product peak.The software uses the following criteria to determine whether it will use exponential skimming:• Exponential Peak Ratio.• Exponential Adjusted Ratio.• Exponential Valley Ratio.Release Date: August 2011 31