Radiant energy – Ionic separation or analysis – Cyclically varying ion selecting field means
Reexamination Certificate
2005-12-20
2005-12-20
Wells, Nikita (Department: 2881)
Radiant energy
Ionic separation or analysis
Cyclically varying ion selecting field means
C250S281000, C250S282000, C250S290000, C250S291000
Reexamination Certificate
active
06977373
ABSTRACT:
An ion-trap mass analyzing apparatus having means for generating ion-capture electric fields asymmetrical with respect to a reference plane containing a central point of a ring electrode and perpendicular to a central axis of the ring electrode in the inside of an ion trap to resonantly amplify ions rapidly to emit the ions from the ion trap in a short time to thereby permit high-sensitive high-accurate mass analysis stably regardless of the structural stability of ions as a subject of analysis.
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Maurizio Splendore, et al.,A New Ion Ejection Method Employing An Asymmetric Trapping Field to Improve The Mass Scanning Performance Of An Electrodynamic Ion Trap, International Journal of Mass Spectrometry 190/191(1999), pps. 129-143.
Lynn A. Gill, et al.,In Situ Optimization Of The Electrode Geometry Of The Quadrupple Ion Trap, International Journal of Mass Spectrometry 188 (1999), pps. 87-93.
Kato Yoshiaki
Mimura Tadao
Tomioka Masaru
Yoshinari Kiyomi
Dickstein , Shapiro, Morin & Oshinsky, LLP
Hitachi High-Technologies Corporation
Leybourne James J.
Wells Nikita
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