Patent ID: 7558682
Filing Date: 2009-07-07
Classification: H01J

Abstract:
1. A chromatograph mass spectrometer, comprising: analysis execution means for obtaining a profile spectrum in a mass range based on a setting condition by one mass scanning; conversion means for converting the profile spectrum into a centroid spectrum; precursor ion selection means for setting an ion of a peak of the centroid spectrum matched with the setting condition to be a precursor ion; means for, in a mass spectrometer that performs mass scanning by the analysis execution means regarding the precursor ion, measuring a known calibrate sample in which overlapping between a compound with a known mass number and an adjacent peak occurs and which has a plurality of peaks having different overlapping degrees, and creating a correction function from a relationship between an overlapping degree with respect to the plurality of peaks and a shift of the mass number; and correction means for correcting the centroid peak with the correction function when the profile spectrum is converted into the centroid spectrum.