Detection of reactive gases

Details Detection of reactive gases Detection of reactive gases

1993-10-04

1995-04-04

Czaja, Donald E.

Chemistry: analytical and immunological testing

Nitrogen containing

Amine and quaternary ammonium

436116, 436136, 436149, 436151, G01N 3300

Patent

active

054037484

ABSTRACT:
A method of detecting the presence or measuring the concentration, of a reactive gas in an inert ambient gas by (i) placing a silicon dioxide film derived from the oxidation of a hydrogen silsesquioxane resin in the inert ambient gas; (ii) passing the inert ambient gas over the film; (iii) monitoring a change in the current flow through the film at a voltage below and above a threshold voltage, as an indication of the presence in the inert ambient gas of a reactive gas; and (iv) determining the threshold voltage of the film as a measure of the concentration of the reactive gas in the inert ambient gas. The silicon dioxide film is characterized by a current-voltage curve which includes both linear and non-linear regions.

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