The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 01, 2011
Filed:
Jun. 27, 2006
Yoshikatsu Umemura, Osaka, JP;
Yoshikatsu Umemura, Osaka, JP;
Shimadzu Corporation, Kyoto, JP;
Abstract
The analyst previously enters the mass of a fragment that desorbs in the first dissociation with other analysis conditions, as the precursor ion selection reference for the second dissociation through the input unit. When the automatic analysis is started, the controller unitsequentially performs the MSanalysis, MSanalysis and MSanalysis. In the course of these analyses, the data processing unitdetermines the valence of each ion species corresponding to the peaks appearing in the mass spectrum obtained by the MSanalysis. In addition, after the MSanalysis, the data processing unitsearches for the ion species in conformity with the selection reference in consideration of the determined valence, among the ion species corresponding to the peaks appearing in the mass spectrum by the MSanalysis. The selected ion is determined as the precursor ion for the second dissociation in the MSanalysis. In this manner, regardless of the valence of the target ion, the precursor ions to be selected and dissociated in each stage of the MSanalysis are automatically selected according to the mass of the fragment desorbed in the dissociation in the previous stage. Therefore, the analytical efficiency is improved and the highly accurate chemical structure information can be obtained.