Electrochemical gas detection method

Details Electrochemical gas detection method Electrochemical gas detection method

1975-04-21

1976-11-16

Mack, John H.

Chemistry: electrical and wave energy

Processes and products

324 30B, G01N 2746

Patent

active

039922677

ABSTRACT:
An electrochemical cell comprising an anode, a cathode and a reference electrode operating in an aqueous electrolyte is utilized for detection of noxious gases in air. The gas is oxidized at the anode and detection thereof occurs as a result of the current generated by the reaction. A fixed potential difference is maintained between the anode and the reference electrode to avoid generation of undesired current from reactions involving an oxygen-water redox couple within the cell which would invalidate anode-cathode current for gas detection purposes. The fixed potential is chosen from within the range of about 0.9 to 1.5 volts.

REFERENCES:
patent: 3260656 (1966-07-01), Ross, Jr.
patent: 3278408 (1966-10-01), Leonard et al.
patent: 3689394 (1972-09-01), Davies et al.
R. J. Roethlein et al., J. Electrochem. Soc., vol. 116, pp. 37-40, (1969).
P. Hersch, in "Advances in Analytical Chem. & Instrumentation," vol. 3, (1964), Wiley, N. Y., pp. 185, 234-235.
I. M. Kolthoff et al., Editors, "Treatise on Analytical Chem.," Part 1, vol. 10, p. 6337.
L. Meites, "Polarographic Techniques," Interscience, N. Y., 1955, pp. 205-211.

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