Three dimensional quadrupole mass spectrometry and mass spectrom

Details Three dimensional quadrupole mass spectrometry and mass spectrom Three dimensional quadrupole mass spectrometry and mass spectrom

1997-05-20

1998-08-04

Berman, Jack I.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

250282, H01J 4942

Patent

active

057897476

ABSTRACT:
In a three dimensional quadrupole mass spectrometry, ions created in an ion source 1 are introduced into a three dimensional quadrupole field 7 formed in an ion introduction space and trapped therein. When one or more parameters of the three dimensional quadrupole field is scanned, the ions of which oscillation are instablized are successively discharged to the outside thereof and are detected by a detector 12. The signal representing the detected ions is processed by a data processing unit 13 to determine mass spectrum thereof. Prior to the above mass spectrometry, a preliminary measurement for the created ions is performed by detecting the ions passing through the ion introduction space as they are with no influences therefrom within a predetermined period by the detector 12 and a time interval during which the created ions are to be introduced into the ion introduction space for the mass spectrometry is determined based on the detected ion amount in the preliminary measurement. Thereby, the measurement time by the three dimensional quadrupole mass spectrometry is shortened while preventing ion saturation and space charge caused by the ions.

REFERENCES:
patent: 2939952 (1960-06-01), Wolfgang et al.
patent: 3527939 (1970-09-01), Dawson et al.
patent: 4540884 (1985-09-01), Stafford et al.
patent: 4771172 (1988-09-01), Weber-Grabau et al.
patent: 5107109 (1992-04-01), Stafford, Jr. et al.
patent: 5302827 (1994-04-01), Foley
patent: 5479012 (1995-12-01), Wells
patent: 5572022 (1996-11-01), Scwartz et al.

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