Ion trap mass spectrometer

Details Ion trap mass spectrometer Ion trap mass spectrometer

1998-10-07

2000-09-19

Nguyen, Kiet T.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

H01J 4942

Patent

active

061216100

ABSTRACT:
By preventing the trapping efficiency of ions from largely depending on the mass-to-charge ratio, an ion trap mass spectrometer suitable for obtaining a high sensitive mass spectrum is provided. Ions of a specimen to be mass analyzed generated at an external ion source pass through an ion transportation portion and then injected into a space (ion trap volume) between the ring electrode and the end cap electrodes. An RF trap voltage power source applies an RF frequency V.multidot.cos .OMEGA.t between the ring electrode and the end cap electrodes to form a radio frequency electric field in the ion trap volume. The RF trap voltage is changed so that the optimum trap frequency is in inverse proportion to 1/2 power of a mass-to-charge ratio while the ions are being trapped in the radio frequency electric field formed in the ion trap volume.

REFERENCES:
patent: 4685367 (1987-08-01), Louris et al.
patent: 4736101 (1988-04-01), Syka et al.
patent: 4771172 (1988-09-01), Weber-Grabau et al.
patent: 4818869 (1989-04-01), Weber-Grabau
patent: 5107109 (1992-04-01), Stafford, Jr. et al.
patent: 5198655 (1993-03-01), Suetsugu et al.
patent: 5291017 (1994-03-01), Wang et al.
patent: 5302826 (1994-04-01), Wells
patent: 5324939 (1994-06-01), Louris et al.
patent: 5404011 (1995-04-01), Wells et al.
patent: 5451782 (1995-09-01), Kelley
patent: 5457315 (1995-10-01), Wells et al.
patent: 5517025 (1996-05-01), Wells et al.
patent: 5521380 (1996-05-01), Wells et al.
patent: 5561291 (1996-10-01), Kelley et al.
patent: 5608216 (1997-03-01), Wells et al.
patent: 5623144 (1997-04-01), Yoshinari et al.
patent: 5679951 (1997-10-01), Kelley et al.
patent: 5710427 (1998-01-01), Schubert et al.
patent: 5729014 (1998-03-01), Mordehai et al.
patent: 5747801 (1998-05-01), Quarmby et al.
patent: 5789747 (1998-08-01), Kato et al.

Affiliated with

Also associated with

Rating

Ion trap mass spectrometer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ion trap mass spectrometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ion trap mass spectrometer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1075711