Method for selective collisional dissociation using border effec

Details Method for selective collisional dissociation using border effec Method for selective collisional dissociation using border effec

1993-05-27

1995-01-03

Berman, Jack I.

Radiant energy

Ionic separation or analysis

Methods

250292, H01J 4942

Patent

active

053788915

ABSTRACT:
A variable cooling time is imposed on ions in a quadrupole ion trap prior to excitation through border effect operation. Continuous variation of the cooling time brings about continuous variation of the selected ion internal energy when subjected to the boundary effect such that the boundary effect competes more favorably with ion loss in the trap, and fragmentation reaction channels having successively greater energies of activation can be accessed preferentially.

REFERENCES:
patent: 4540884 (1985-09-01), Stafford et al.
patent: 4975577 (1990-12-01), Franzen et al.
patent: 5298746 (1994-03-01), Franzen et al.
Ardanaz et al., Rapid Communications in Mass Spectrometry, vol. 5, No. 1, 1991, pp. 5-10.
Lammert et al., J. Am. Soc. Mass Spectrom. 1991, 2, 487-491.

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