Mass spectrum analyzing system
AssigneeHitachi High-Technologies Corporation
InventorsAtsushi Ootake, Kinya Kobayashi, Kiyomi Yoshinari, Atsumu Hirabayashi, Izumi Waki
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Abstract
The measurement throughput and the precision in sample identification are improved in a tandem type mass spectrograph. Thus, in a mass spectrum analyzing system utilizing a tandem type mass spectrograph in which the selection of an ionic species to serve as the measurement target, dissociation thereof and spectral measurement are repeated in n stages, the ionic species to be measured in MSn is selected based on the mass-to-charge ratios (m/z values) obtained as a result of the spectral analysis in MSn−1 (n≧2), and this procedure is repeated until the sequence of a required number of amino acids is determined.
Claims23
A mass spectrum analyzing system using a tandem type mass spectrograph in which a measurement target substance is ionized and an ionic species having a specific mass number is selected from among the ionic species formed and is further dissociated, and such measurement target ionic species selection and dissociation are repeated in n stages,
- wherein whether the n-th stage tandem mass analysis is to be carried out or not is determined based on all mass-to-charge ratio (m/z) peaks obtained by the spectral measurement in the (n−1)th stage.
Dependencies are inferred from the claim text.