Method for injection of externally produced ions into a quadrupo

Details Method for injection of externally produced ions into a quadrupo Method for injection of externally produced ions into a quadrupo

1996-07-11

1998-03-17

Anderson, Bruce

Radiant energy

Ionic separation or analysis

Methods

250292, B01D 5944, H01J 4900

Patent

active

057290148

ABSTRACT:
A method of ion collection over a wide mass-to-charge range from continuous ion source into a quadrupole ion trap filled with a buffer gas directing an ion beam, from an external ion source to a radio frequency ion trap through a gating device for a predetermined period of accumulation time to allow the beam to enter the trap, trapping ions over a range of masses by applying a radio frequency voltage to the trap and changing an amplitude of the radio frequency voltage adiabatically to achieve a uniform trapping efficiency for ions over a predetermined mass range. The predetermined period of accumulation time may be divided into a plurality of segments, and the amplitude of the radio-frequency voltage is changing adiabatically within each segment.

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