Mass spectrometer and mass spectrometry method

Abstract

The precursor ion is reacted with ammonia molecules or ammonia radicals to generate product ions, the product ions are separated according to a mass-to-charge ratio, and detected. It is estimated that whether or not an aldehyde group is included in a molecular structure of the precursor ion based on a difference between a mass-to-charge ratio of one of the detected product ion and a mass-to-charge ratio of the precursor ion. In addition, provided is a mass spectrometer (1) including: a reaction chamber (132) to which the precursor ions are introduced; an ammonia supply part (5) configured to supply ammonia molecules or ammonia radicals to the reaction chamber; and separation and detection parts (142, 143, 144, and 145) configured to separate product ions generated from the precursor ion by reaction with the ammonia molecules or ammonia radicals according to a mass-to-charge ratio, and to detect the product ions.

Dependencies are inferred from the claim text.