Patent ID: 9230784
Filing Date: 2016-01-05
CPC Classification: G01N,H01J

Claim Text:
1. A mass spectrometer in which sample components separated by a liquid chromatograph are ionized, and the obtained ions are cleaved and subjected to mass spectrometry to perform MS n analysis (n is an integer of 3 or greater), the mass spectrometer comprising: a MS measurement processing section configured to measure a MS spectrum which represents a relation of a mass-to-charge ratio and an intensity by performing mass spectrometry of the ionized sample components; an ion detection processing section configured to detect, as a MS/MS precursor ion, an ion, the intensity distribution of which forms a peak waveform at both of each retention time and each mass-to-charge ratio, based on three-dimensional information of a retention time, a mass-to-charge ratio and an intensity, which is obtained by correlating the MS spectrum with the retention time; an overlap determination processing section configured to determine whether or not isotopic distributions of a plurality of ions detected as MS/MS precursor ions have overlapping m/z ranges at each retention time; and an execution determination processing section configured to determine whether or not MS