Patent ID: 8417466

Claim:
A mass analysis data processing system for processing mass analysis data collected by using a mass spectrometer capable of an MS n analysis (where n is an integer greater than one), the mass analysis data being obtained by an MS n analysis on an ion having a specific mass as a precursor ion for each of at least two components inclusive of a first component and a second component, which is characterized by comprising: a) an MS n spectrum creating means for creating an MS n spectrum based on mass analysis data obtained for each of the first component and the second component; b) an MS n mass-difference spectrum creating means for calculating, for each of the two MS n spectrums, a mass difference between a mass of each peak among some or all of peaks appearing on the MS n spectrum and a mass of the precursor ion, and for creating an MS n mass-difference spectrum having a peak at each calculated mass difference; c) a common-peak extracting means for extracting a common peak having a same mass in the two MS n spectrums relating to the first component and the second component and/or the two MS n mass-difference spectrums relating to the first component and the second component; d) a complementary-peak extracting means for extracting a complementary peak on the MS n spectrum and/or the MS n mass-difference spectrum relating to the first component and/or the second component, the complementary peak corresponding to a mass difference between the mass of the precursor ion used in the MS n analysis for the first component and/or the second component and the mass of the common peak; and e) a display control means for showing the MS n spectrum and/or the MS n mass-difference spectrum on a display screen, with the complementary peak having a style visually distinguishable from that of other peaks on the MS n spectrum and/or the MS n mass-difference spectrum relating to the first component and/or the second component.