Process for the mass-spectrometric investigation of isotopes, as

Details Process for the mass-spectrometric investigation of isotopes, as Process for the mass-spectrometric investigation of isotopes, as

1990-02-14

1991-08-27

Anderson, Bruce C.

Radiant energy

Ionic separation or analysis

Methods

250282, 250296, B01D 5944, H01J 4900

Patent

active

050435752

ABSTRACT:
In isotope mass spectrometry, there is the problem that in the case of very great frequency differences, the less frequent masses are swamped by the more frequent masses in the measurement result or that the corresponding measurement result is falsified. A correction device is proposed, which comprises a quadrupole mass filter with a voltage supply device which is controlled by the ion separation system and is designed in such a manner that the supply voltages of the quadrupole mass filter and thus its characteristic with respect to the mass quantity to be allowed through are switched over synchronously with the varying mass deflection setting of the ion separation system.

REFERENCES:
patent: 3080754 (1963-03-01), Johnson
patent: 3786249 (1974-01-01), Ambar
patent: 3885155 (1975-05-01), Ambar
patent: 3950641 (1976-04-01), Evans et al.
patent: 4234791 (1980-11-01), Enke et al.
patent: 4536652 (1985-08-01), Cooks et al.
"A New Filter Supplement for Isotope Ratio Measurements" by H.-J. Laue and H. Wollnik, International Journal of Mass Spectrometry and Ion Processes, 84 (1988) 231-241.
"A Variable Geometry Multipocket Collector for Electromagnetic Sector Separators" by Rudolf Wagner, Nuclear Instruments and Methods, 139 (1976) 73-78.
"A New `Hybrid` Sector/Quadrupole Mass Spectrometer for Mass Spectrometry/Mass Spectrometry" by G. L. Glish, S. A. McLuckey, T. Y. Ridley and R. G. Cooks, Int'l Journal of Mass Spectrometry and Ion Physics, 41 (1982) 157-177.

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