Multimode ionization source

Details Multimode ionization source Multimode ionization source

1989-10-17

1990-10-02

Berman, Jack I.

Radiant energy

Ionic separation or analysis

250282, 250288, 250289, H01J 4910

Patent

active

049609912

ABSTRACT:
A multimode ionization source includes a resistive filament aligned with an exit cone orifice. The filament generates electrons that bombard molecules near the orifice. In electron impact mode, a pressure regulator selects a low pressure within an ionization chamber and gaseous analyte is injected through a gas inlet and ionized by electron bombardment. In chemical ionization mode, an intermediate pressure of reagent gas established; electrons ionize the reagent gas. Gaseous analyte is introduced is ionized by the reagent gas through chemical interaction. In thermospray mode, a high pressure is established and heated liquid analyte is introduced into the chamber as a spray which is ionized by ion evaporation; in a thermospray/chemical ionization submode, filament activation supplements ion evaporation. Ions produced in all modes can be directed to a mass analyzer for analysis.

REFERENCES:
patent: 4647772 (1987-03-01), Lewis et al.
patent: 4814612 (1989-03-01), Vestal et al.
patent: 4851700 (1989-07-01), Goodley

Affiliated with

Also associated with

Rating

Multimode ionization source does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-294089