Method of mass analyzing a sample by use of a quistor
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United States of America Patent
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-
Nov 21, 1989
Grant Date -
N/A
app pub date -
Oct 31, 1988
filing date -
Apr 13, 1988
priority date (Note) -
Expired
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Abstract
In a quadrupole ion store (QUISTOR), a sample is analyzed by increasing themplitude of the harmonic, or 'secular', oscillations of selected stably trapped ions so that they leave the trapping field. In a preferred embodiment, deviations from the ideal electrode geometry are incorporated into the QUISTOR to produce resonance phenomena between the r and z secular oscillations, thereby increasing the amplitude of oscillations in the z direction.
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