Radiant energy – Ionic separation or analysis
Reexamination Certificate
2005-04-26
2005-04-26
Berman, Jack I. (Department: 2881)
Radiant energy
Ionic separation or analysis
C250S282000, C250S288000, C250S292000
Reexamination Certificate
active
06884995
ABSTRACT:
A mass spectrometer is disclosed comprising a collision cell wherein ions having substantially different mass to charge ratios are arranged to be transmitted through at least a portion of the collision cell at substantially the same time and with substantially the same velocity preferably by means of one or more transient DC voltages or one or more transient DC voltage waveforms which are applied to the electrodes forming the collision cell so that ions are urged through the collision cell at a constant controlled velocity. By appropriate setting of the velocity of the DC voltage or DC voltage waveform passing along the length of the collision cell an efficient collision cell is provided which is able to fragment ions having considerably different mass to charge ratio at substantially the same time in an optimal manner.
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Bateman Robert Harold
Giles Kevin
Hoyes John Brian
Pringle Steve
Berman Jack I.
Diederiks & Whitelaw PLC
Micromass UK Limited
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