Patent ID: 8198585
Filing Date: 2012-06-12
Classification: G01N,G16C,H01J

Abstract:
1. A chromatograph mass spectrometer in which a chromatograph for separating a sample into components and a mass spectrometer for mass analyzing the sample components separated by the chromatograph are combined, and the mass spectrometer being capable of an MS n analysis in which an ion having a specific mass-to-charge ratio is selected as a precursor ion, the precursor ion selected is dissociated, and product ions created through the dissociation are mass analyzed, comprising: a) a graph displayer for creating a graph, based on data obtained by performing an MS b) a specifier for allowing a user to provide a visual indication on the graph displayed by the graph displayer, the visual indication specifying an intended range on the graph; c) a precursor ion selector for selecting one or more ions, as a precursor ion from the visual indication specifying the intended range, the one or more ions corresponding to a peak or peaks existing in the range specified by the specifier or a remaining peak or peaks other than the peak or peaks existing in the range; and d) an analysis controller for sequentially performing a series of predetermined MS