Patent ID: 8884218
Filing Date: 2014-11-11
Classification: H01J

Abstract:
1. A method for mass spectrometry for an identification and/or structural analysis of an unknown substance using a mass spectrometer capable of obtaining an MS n spectrum by performing an MS n analysis in which an ion originating from a substance to be analyzed is dissociated in n-1 stages (where n is an integer equal to or greater than two), comprising: a) a structural formula deduction step, in which a chemical structural formula of an unknown substance is deduced based on a molecular weight of the unknown substance determined from a mass spectrum obtained by performing a mass spectrometry of the unknown substance or on a composition formula deduced from the molecular weight; b) a dissociation state deduction step, in which a production to be detected in an MS c) an evaluation step, in which a spectrum pattern formed by the product ion deduced in the dissociation state deduction step and an MS wherein in the evaluation step, the spectrum pattern formed by the product ion based on a prediction of the dissociation pattern with an increased value of n and an MS