Quadrupole trap improved technique for ion isolation

Details Quadrupole trap improved technique for ion isolation Quadrupole trap improved technique for ion isolation

1992-05-29

1993-03-30

Dzierzynski, P. M.

Radiant energy

Ionic separation or analysis

Methods

250281, 250291, 250292, H01J 4942

Patent

active

051986655

ABSTRACT:
A method for isolating an ion in a QIT (1) employing values from a mass axis calibration chart to establish the maximum DAC value to scan to in order to scan out m(p)-1 and less during ramp up of RF trapping field while applying a specifically selected fixed supplemental frequency applied during said calibration; and employing values from the calibration curve to establish the DAC value to scan out m(p)+1 and greater during ramping down of RF trapping field, while applying a previously determined fixed broadband spectrum to the QIT end caps.

REFERENCES:
patent: 4736101 (1988-04-01), Syka et al.
patent: 4749860 (1988-06-01), Kelley et al.
patent: 4761545 (1988-08-01), Marshall et al.
patent: 4945234 (1990-07-01), Goodman et al.
patent: 4990856 (1991-02-01), Anderson et al.
patent: 5075547 (1991-12-01), Johnson et al.
patent: 5128542 (1992-07-01), Yates et al.
patent: 5134286 (1992-07-01), Kelley

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