| 摘要 |
An identification probability estimation model, which shows the relationship between the S/N ratios of MS1 peaks and the cumulative number of the peaks in the case where MS2 measurements and identifications is performed in descending order of S/N ratio, is created beforehand from the S/N ratios of MS1 peaks as well as the results of MS1 or MS2 measurements and identifications (success or failure) performed for a number of fractionated samples obtained from a predetermined sample. Based on an evaluated value of the identification probability and that of the identification probability increment, an order of priority of MS2 measurements for a plurality of MS1 peaks is determined, and an MS2 measurement sequence which gives the maximal expectation value of the number of substances to be identified under a limitation on the number of MS2 measurements or other factors is determined.
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