Selective ionization apparatus and methods

Details Selective ionization apparatus and methods Selective ionization apparatus and methods

1991-10-07

1993-09-14

Anderson, Bruce C.

Radiant energy

Ion generation

Field ionization type

250287, 250423F, 3133621, H01J 3708

Patent

active

052451925

ABSTRACT:
A gaseous sample that is to be analyzed is passed through an array of fine slits whose edges are covered with electrodes of opposite polarities to which is applied a variable electric potential. The voltage between the electrodes is varied at a programmed rate, so that the gaseous molecules become selectively ionized according to their required ionization energies. Measurement of the ionization current as a function of the voltage between the electrodes yields information about the identities and concentrations of the molecular species that are present in the gas. This selective ionization at atmospheric pressure improves the selectivity and dynamic range of ion mobility spectrometers and is also applicable to mass spectrometry and to improved analyte detection in gas chromatography.

REFERENCES:
patent: 3621242 (1971-11-01), Ferguson et al.
patent: 3665241 (1972-05-01), Spindt
patent: 3852595 (1974-12-01), Aberth
patent: 4458149 (1984-07-01), Muga
patent: 4677295 (1987-06-01), Negra et al.
patent: 4902897 (1990-02-01), Iwamatsu
patent: 4926056 (1990-05-01), Spindt
patent: 5026997 (1991-06-01), Benveniste

Affiliated with

Also associated with

Rating

Selective ionization apparatus and methods does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2029424