Quadrupole mass spectrometer

Details Quadrupole mass spectrometer Quadrupole mass spectrometer

1991-11-29

1993-07-13

Dzierzynski, Paul M.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

250290, H01J 4942

Patent

active

052276295

ABSTRACT:
A small AC voltage V.sub.a .multidot.cos.omega..sub.a t (perturbation AC voltage) is applied to the electrodes of a quadrupole mass spectrometer besides the normal DC and AC voltages U and V.multidot.cos.omega.t (mass scanning voltages). The perturbation AC voltage generates unstable bands UB1, UB2 in a triangular stable region SR and cut off the skirts of the peak profile of every mass, which enhances the resolution of masses in the mass spectroscopy and improves the reliability of the measurement results.

REFERENCES:
patent: 3147445 (1964-09-01), Wuerker et al.
patent: 3784814 (1974-01-01), Sakai et al.
patent: 4214160 (1980-07-01), Fies et al.
patent: 4703190 (1987-10-01), Tamura et al.
patent: 5089703 (1992-02-01), Schoen et al.
"Quadrupole Mass Spectrometer and its applications", Peter H. Dawson (Editor), Elsevier Scientific Publishing Company, 1976.

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