Quadruple ion trap method having improved sensitivity

Details Quadruple ion trap method having improved sensitivity Quadruple ion trap method having improved sensitivity

1992-07-31

1994-04-05

Anderson, Bruce C.

Radiant energy

Ionic separation or analysis

Methods

250292, B01D 5944, H01J 4940

Patent

active

053007727

ABSTRACT:
A method for improving sensivity of a QIT by overcoming deleterious space charge effects on the collection of higher mass ions in a QIT by rejecting residual air gas ions during ionization and by rejecting other ions during ionization employing a 1/m/z weighting of the amplitude of each secular frequency, where m/z is the mass to charge ratio of the ions.

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patent: 5075547 (1991-12-01), Johnson et al.
patent: 5089703 (1992-02-01), Schoen et al.
patent: 5171991 (1992-12-01), Johnson et al.
patent: 5173604 (1992-12-01), Kelley
McLuckey, Scott A. "Selective Ion Isolation/Rejection Over A Broad Mass Range in the Quadrupole Ion Trap," J. Am. Soc. Mass Spectromet., 1991, vol. 2, pp. 11-21.

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