Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1983-10-13
1985-06-25
Kaplan, G. L.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204415, 204431, 204432, G01N 2746
Patent
active
045252661
ABSTRACT:
An electrochemical gas detection cell, particularly suitable for detecting H.sub.2 S, includes an electrochemical gas sensor which has a reference electrode, a sensing electrode and a counter electrode. The counter electrode is composed of carbon. The sensing electrode is composed of either gold or platinum and the reference electrode is composed of platinum. Circuitry is provided to supply voltage to the electrodes, the sensing electrode bias can be held below 300 mv., with respect to the reference electrode. The agent H.sub.2 S can be readily detected when the bias is about 250 mv. The cell is associated with signal processing circuitry which produce audible and visual outputs. A nonaqueous electrolyte is provided. The electrolyte may be composed of either propylene carbonate or n-methyl-2-pyrrolidone and one of conductive compatible salts, such as tetrabutyl ammonium tetrafluoroborate.
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Campbell Donald N.
Clay Sandra B.
Schmidt John C.
Allied Corporation
Kaplan G. L.
Lamb Bruce L.
Nguyen Nam X.
Trepp Robert M.
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