Radiant energy – Ionic separation or analysis – Cyclically varying ion selecting field means
Patent
1990-12-12
1992-02-18
Berman, Jack I.
Radiant energy
Ionic separation or analysis
Cyclically varying ion selecting field means
250281, 250282, H01J 4938
Patent
active
050897020
ABSTRACT:
An ICR ion trap comprises electrically conductive side plates (1) extending in parallel to one axis (Z), and electrically conductive end plates (5,6) extending perpendicularly to the said axis (Z). Additional electrode plates (8,9) are arranged at a certain spacing from the said end plates (5,6) and can be supplied with trapping potentials of a polarity opposite to the polarity of the potentials applied to the said end plates so that an outer space is defined in which electrodes of opposite sign are trapped. Following analysis and elimination of the ions contained in the inner space, the ions of opposite sign can be trapped in the inner space for subsequent analysis. The arrangement provides also the possibility to observe recombination reactions between ions of different signs.
REFERENCES:
patent: 4588888 (1986-05-01), Ghaderi
patent: 4686365 (1987-08-01), Meek
patent: 4746802 (1988-05-01), Kellerhals
patent: 4982087 (1991-01-01), Allemann et al.
"Int. J. of Mass Spectr. and Ion Processes" 72 (1986), 33-51, 63-71.
"ESN-European Spectroscopy News" 58 (1985), 16-18.
Allemann Martin
Caravatti Pablo
Berman Jack I.
Hackler Walter A.
Spectrospin AG
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