Patent ID: 9171706
Filing Date: 2015-10-27
Classification: H01J

Abstract:
1. A mass analysis device, comprising: an ion trap which temporarily captures ions derived from a target compound which is the object of analysis, and promotes the dissociation of the captured ions; a gas supply which introduces cooling gas, for cooling the ions captured in the internal space of said ion trap, into said ion trap; an analysis execution unit which executes, on the same sample, multiple mass analyses with different gas pressure conditions in said ion trap created by the gas supplied into the ion trap by said gas supply; and a precursor ion selection unit which, by comparing the signal intensities of peaks of the same mass/charge ratio for the multiple mass spectra acquired under the aforementioned different gas pressure conditions, distinguishes multiple ions having the same basic structure and differing in the number of modifiers bonded to said basic structure, and selects at least one of those ions as a precursor ion.