Measuring gas levels

Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy

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20415317, 204400, 204412, 204415, 204432, G01N 2726

Patent

active

050645161

ABSTRACT:
A method for measuring the amount of an electroactive gas in a gaseous mixture using an electrochemical cell, the cell including a working electrode (anode), counter electrode (cathode), an electrolyte in which oxygen reduction is inhibited, means for applying a variable potential across the electrodes, and means for measuring current flow between the electrode, the method involving contacting the gaseous mixture with the anode, applying a potential across the anode and cathode and cycling the applied potential between a potential level at which the gas in the gaseous mixture adsorbs onto the anode and a potential level at which the adsorbed gas in the gaseous mixture is oxidized, and measuring the current resulting from the anodic sweep portion of the potential cycle as a measure of the amount of the adsorbed gas in the gaseous mixture.

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