Chemistry: electrical and wave energy – Processes and products
Patent
1976-04-08
1977-10-04
Tung, T.
Chemistry: electrical and wave energy
Processes and products
204195R, G01N 2746
Patent
active
040522687
ABSTRACT:
In the detection and measuring of NO, NO.sub.2 and mixtures thereof, a unit comprising in combination intake means, an electrochemical cell, means for drawing the gas through said intake means and into said electrochemical cell at a controlled flow rate, readout means for reading the quantity of gas detected, the electrochemical cell comprising an anode, a cathode, a reference electrode at which substantially no current flows and an aqueous electrolyte in contact with said anode, cathode and reference electrode, means for exposing said anode to said gas, means for maintaining said anode at a fixed potential relative to the reference electrode in excess of 1.5 V up to about 1.9 V with respect to a reversible hydrogen electrode in said electrolyte of said first electrochemical cell, the anode of said first electrochemical cell comprising a gold catalyst bonded to a hydrophobic material to provide a diffusion electrode.
REFERENCES:
patent: 3622487 (1971-11-01), Chand et al.
patent: 3763025 (1973-10-01), Chand
patent: 3776832 (1973-12-01), Oswin et al.
patent: 3821090 (1974-06-01), Topol et al.
patent: 3824167 (1974-07-01), Oswin et al.
Blurton Keith F.
Sedlak John M.
Energetics Science, Inc.
Tung T.
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