Multipole ion guide for mass spectrometry

Details Multipole ion guide for mass spectrometry Multipole ion guide for mass spectrometry

2005-05-24

2005-05-24

Berman, Jack I. (Department: 2881)

Radiant energy

Ionic separation or analysis

With sample supply means

C250S281000

Reexamination Certificate

active

06897439

ABSTRACT:
A multipole ion guide which begins in one pumping stage and extends continuously into one or more subsequent pumping stages has been incorporated into an atmospheric pressure ion source mass spectrometer system. Ions delivered into vacuum from an Electrospray, Atmospheric Pressure Chemical Ionization or Inductively Coupled Plasma ion source are guided and focused into a mass analyzer with high efficiency using the multipole ion guide. The background pressure over a portion of the multipole ion guide length is high enough to cause kinetic energy cooling of ions traversing the ion guide length due to ion collisions with neutral background gas molecules. This ion kinetic energy cooling lowers energy spread of ions traversing the multipole ion guide length. The multipole ion guide DC offset potential can be used to adjust the mean ion energy and the ion guide anand qnvalues can be set to reduce or expand the range of ion mass to charge which will be transmitted through the ion guide. These features of multipole ion guides and multiple pumping stage multipole ion guides are used to improve performance and lower the cost of Atmospheric Pressure Ion source mass spectrometer instruments.

REFERENCES:
patent: 6403953 (2002-06-01), Whitehouse et al.

Affiliated with

Also associated with

Rating

Multipole ion guide for mass spectrometry does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multipole ion guide for mass spectrometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multipole ion guide for mass spectrometry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3412379