Patent ID: 7932486

Claim:
A mass spectroscopy system comprising: ionization means for ionizing a substance as an object of measurement for a mass spectrometer; and means for selecting an ion species with a specific mass-to-charge ratio m/z from ions produced by said ionization means and dissociating the same, wherein the selection, dissociation and measurement of the ion species as the measurement object are repeated in a plurality of stages, said mass spectroscopy system further comprising: mass spectroscopy data acquisition means for performing the selection and dissociation of an ion species n−1 times (n≧1, where n is an integer) and acquiring a peak of measurement intensity against the mass-to-charge ratio of the ion that has been selected and dissociated; correspondence determination means for comparing the peak of measurement intensity against the mass-to-charge ratio of the ion that is obtained by the mass spectroscopy data acquisition means with the characteristics data of a certain ion species in order to determine the possibility of correspondence of the ion that has been selected and dissociated to the certain ion species; next-analysis content determination means for determining the analysis content in an n-th stage mass spectroscopy based on the result of determination by said correspondence determination means; and a data processing unit configured such that the combined time required by the correspondence determination means and the next-analysis content determination means is 10 milliseconds or less.