Detection of reactive gases

Details Detection of reactive gases Detection of reactive gases

G - Physics

01

N

G01N 27/12 (2006.01) G01N 27/00 (2006.01)

Patent

CA 2132810

DETECTION OF REACTIVE GASES 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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