Device and method for the improved mass resolution of time-of-fl

Details Device and method for the improved mass resolution of time-of-fl Device and method for the improved mass resolution of time-of-fl

1997-01-14

1998-04-14

Anderson, Bruce

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

250282, B01D 5944, H01J 4900

Patent

active

057395292

ABSTRACT:
In a time-of-flight mass spectrometer with an ion reflector located after the ion source and before the ion detector, to compensate for different starting energies of ions of equal masses, in the ion flight path inside or after the ion reflector at least one electrode is provided for, to which a pulsed high voltage is applied in such a way that within a predetermined narrow range of ion masses, time-of-flight errors for ions of equal masses due to different formation locations or times in the ion source are compensated for at the ion detector. In this way, apart from an energy compensation, also time-of-flight errors of the ions under investigation can simultaneously be compensated for.

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Robert J. Cotter, Time-of-Flight Mass Spectrometry for the Structural Analysis of Biological Molecles, Analytical Chemistry, vol. 64, No. 21, pp. 1027-1039, Nov. 1, 1992.
George E. Yefchak et al., Models For Mass-Independent Space and Energy Focusing In Time-Of-Flight Mass Spectrometry, International Journal of Mass Spectrometry and Ion Processes, vol. 87, pp. 313-330, 1989 no month.
Johann M. Grundwumer et al., High-resolution mass spectrometry in a linear time-of-flight mass spectrometer, vol. 131, pp. 139-148, 1994 no month.

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