Method for detecting a reducing material in a gas phase

Details Method for detecting a reducing material in a gas phase Method for detecting a reducing material in a gas phase

1974-08-12

1977-01-04

Queisser, Richard C.

Electrical resistors

Resistance value responsive to a condition

Gas, vapor, or moisture absorbing or collecting

23254E, 29620, 73 23, G01N 2712

Patent

active

040017575

ABSTRACT:
A method for detecting the presence of a reducing material in a gas phase which involves heating a gas sensor, which has, as a major part, a partially dehydrated iron hydroxide having electrodes applied thereto, to a temperature less than 500.degree. C and bringing the gas sensor in contact with the gas phase of the reducing material or a gaseous mixture containing the reducing material. The gas sensor can be easily fabricated, and when exposed to a reducing material it undergoes a rapid decrease in electric resistance.

REFERENCES:
patent: 3271719 (1966-09-01), Ovshinsky
patent: 3343075 (1967-09-01), Ovshinsky
patent: 3507145 (1970-04-01), Loh
patent: 3716337 (1973-02-01), Jones
patent: 3725836 (1973-04-01), Wada et al.
patent: 3754987 (1973-08-01), Purdes
patent: 3778229 (1973-12-01), Webster et al.
patent: 3793605 (1974-02-01), Fehlner
Seiyama et al., Analytical Chemistry, "Study on a Detector for Gaseous Components Using Semiconductive Thin Films," vol. 38, No. 8, pp. 1069-1073, July 1966.

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