Patent ID: 7435949

Claim:
A mass spectrometric analysis system using a tandem mass spectroscope for ionizing a measurement-target substance, performing mass spectrometric analysis of various ion types generated, selecting and dissociating an ion type from among said various ion types generated, said ion type having a specific mass-to-charge ratio (m/z), and thereby, repeating mass spectrometric analysis measurement on said ion of said ion type over n stages (n=1, 2, . . . ), wherein said mass spectrometric analysis system comprises: a data processing unit for judging control content for the analysis next to MS n within a predetermined time, on each analysis-target ion basis, and based on ion intensity, said MS n being said n-th stage mass spectrometric analysis, said ion intensity being represented by an ion peak with respect to said mass-to-charge ratio of each ion in said MS n result.