Method and device for in-phase excitation of ion ejection from ion trap mass spectrometers
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 13, 1994
Grant Date -
N/A
app pub date -
Dec 23, 1992
filing date -
Dec 23, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improvement of a fast scanning method in an ion trap mass spectrometer comprises setting the frequency and phase relationships between the ion trap storage frequency and the ion trap excitation frequency in such a way that the ions of consecutive masses each gain precisely the same 'phase rhythm' or 'phase sequence'. The phase rhythm, or the historical succession of phase positions up to ion ejection, is optimally set in accordance with nonlinear resonance conditions used to cause ion ejection. The excitation voltage frequency is set to a value somewhat smaller that an integral fraction of the storage voltage frequency and the scan profile is set based on the excitation frequency so that the same time is required for ions of each mass to be ejected and so that precisely an integer number of cycles of the excitation frequency is used per mass.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully