Ion focusing lensing system for a mass spectrometer interfaced t

Details Ion focusing lensing system for a mass spectrometer interfaced t Ion focusing lensing system for a mass spectrometer interfaced t

1993-06-03

1995-07-11

Anderson, Bruce C.

Radiant energy

Ionic separation or analysis

With sample supply means

250282, B01D 5944, H01J 4900

Patent

active

054323436

ABSTRACT:
This invention describes an ion focusing lensing system and method interfaced between an atmospheric pressure ion source and a mass spectrometer in which the proper positioning of an electrostatic lens within a transition flow pressure region may be used to increase the transmission efficiency of ions to the mass spectrometer. The described configuration allows an increase in ion transmission efficiency to be gained in a manner independent from the operational voltages in the viscous flow pressure region, thereby allowing independent adjustment of the desired degree of collisionally induced dissociation and declustering processes. In addition, proper placement of the electrostatic lens in the transition flow region allows for collimation of the ion beam, enhancing ion beam transmission into the mass spectrometer aperture.

REFERENCES:
patent: 4121099 (1978-10-01), French et al.
patent: 4542293 (1985-09-01), Fenn et al.
patent: 5122670 (1992-06-01), Mylchreest et al.
patent: 5157260 (1992-10-01), Mylchreest et al.

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