Electrochemical gas monitoring method

Details Electrochemical gas monitoring method Electrochemical gas monitoring method

1977-09-22

1979-09-04

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204195R, 204195P, 252413, 324 29, B01J 2396, G01N 2746

Patent

active

041667751

ABSTRACT:
An electrochemical detection system is disclosed for measuring the amount of carbon monoxide or similar oxidizable gases present in a gas phase mixture wherein the gas phase mixture is brought into contact with a liquid electrolyte through a gas-permeable measuring electrode. The improved electrode is formed of a porous membrane of chemically-inert non-wettable material, on one side of which a layer of gold is specially deposited for contact with an electrolyte of a substantially pure aqueous solution of perchloric acid. An electrical readout system is connected to the electrode for deriving a signal from the resulting oxidation current, which corresponds to a quantitative measure of the oxidation of the gas at the electrode-electrolyte interface. In addition to the special method for forming the electrode, a method for rejuvenating it after each sample measurement is disclosed wherein the electrode is successively impressed with an oxidizing (anodic) voltage, a reducing (cathodic) voltage and a working or reading voltage in an appropriate time sequence.

REFERENCES:
patent: 1839488 (1932-01-01), Mason
patent: 2780594 (1957-02-01), Dailey
patent: 2805191 (1957-09-01), Hersch
patent: 3172863 (1965-03-01), Brooke
patent: 3503861 (1970-03-01), Volpe
patent: 3509034 (1970-04-01), Paine
patent: 3694376 (1972-09-01), Kabisch et al.
patent: 4077861 (1978-03-01), Lauer

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