Device and method for detecting alkali metals

Details Device and method for detecting alkali metals Device and method for detecting alkali metals

1979-04-25

1981-08-11

Gill, James J.

Measuring and testing

Gas analysis

Gas chromatography

324468, G01N 2700

Patent

active

042827418

ABSTRACT:
A device for detecting alkali metals in gas streams includes a conduit defining a gas-flow cavity and a metalliferous filament having a work function of at least 5.6 ev extending transversely through the flow path. A heater heats the filament to ionize the alkali metals being detected. A perforated ion-collection member surrounds the filament to define an ionization-collection region. A high-voltage (HV) source develops a HV electrical field within the region, thereby effecting neutralization of the ionized metals contacted with the collection member. An ammeter generates a signal in response to the neutralization and proportional to the rate thereof. A detection method which can be performed by the device is also described.

REFERENCES:
patent: 2550498 (1951-04-01), Rice
patent: 2742585 (1956-04-01), Zemany
patent: 4095171 (1978-06-01), Bauerle et al.
"Methods of Experimental Physics", by Hughes et al., vol. 4, pp. 393-397-Academic Press (1967).

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