Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1986-10-24
1989-06-06
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250372, 250423P, G01N 2764
Patent
active
048374415
ABSTRACT:
An ionization detector for gas chromatography employs as an electron source a film (66) of gold deposited on an ultra-violet lamp (64) within a cylindrical glass body (60) closed at the ends by PTFE plugs (62 and 68). A jet anode (72) receiving effluent from a chromatographic column has its nozzle (74) adjacent the lamp (64) with a triode collector ring (78) between them. A ground wire (80) is connected to the gold film (66). Ultra-violet radiation from the lamp (64) produces a cloud of gold electrons and the consequent ionization of sample molecules from the jet (72) with a corresponding current when voltage is applied.
REFERENCES:
patent: 3087113 (1963-04-01), Foster
patent: 3134898 (1964-05-01), Burnell et al.
patent: 3313971 (1967-04-01), Nagy
patent: 4063156 (1977-12-01), Patterson
patent: 4304997 (1981-12-01), Sullivan et al.
patent: 4733086 (1988-03-01), Simmonds
patent: 4740695 (1988-04-01), Simpson
"Ionization Methods for the Analysis of Gases and Vapors", Lovelock, Analytical Chemistry, vol. 33, No. 2, Feb. '61 pp. 162-178.
Cummings Ronald G.
Fields Carolyn E.
Grimes Edwin T.
Miller John A.
Murphy Thomas P.
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