Mass spectrometer

Details Mass spectrometer Mass spectrometer

H - Electricity

01

J

H01J 49/40 (2006.01)

Patent

CA 2675055

A Time of Flight mass analyser is disclosed wherein the time period between successive orthogonal acceleration pulses is less than the time of flight of ions having the maximum mass to charge ratio of interest. As a result, some ions are subject to wrap-around and will appear in a subsequent mass spectrum. Mass spectra obtained at two different sampling rates may be compared and mass peaks relating to ions which have and have not been subject to wrap-around may be identified.

Un analyseur de masse de temps de vol est décrit, dans lequel la période de temps entre des impulsions d'accélération orthogonales successives est inférieure au temps de vol d'ions ayant le rapport d'intérêt masse/charge maximal. Il en résulte que certains ions sont soumis à un repliement et apparaîtront dans un spectre de masse ultérieur. Les spectres de masse obtenus à deux différentes vitesses d'échantillonnage peuvent être comparés et des pics de masse se rapportant aux ions qui ont ou n'ont pas été soumis à un repliement peuvent être identifiés.

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