Chemistry: electrical and wave energy – Processes and products
Patent
1978-06-16
1980-05-06
Tung, T.
Chemistry: electrical and wave energy
Processes and products
204195R, G01N 2746
Patent
active
042016347
ABSTRACT:
Hydrazine vapors are electrochemically detected and measured by an apparatus comprising in combination intake means, an electrochemical cell, means for drawing said gas through said intake means and into said electrochemical cell, communicating means communicating said intake means with said cell, at least the internal surfaces of said intake means, said communicating means and said cell being of an inert material, the electrochemical cell comprising a sensing electrode, a counterelectrode, a reference electrode at which substantially no current flows, and an aqueous alkaline electrolyte in contact with said sensing electrode comprising a noble metal catalyst bonded to a hydrophobic material to provide a diffusion electrode, means for exposing said sensing electrode to said gas, means electrically coupled to said sensing electrode for maintaining said sensing electrode at a fixed potential of about 0.7 volt to about 1.4 volt with respect to a reversible hydrogen electrode in said electrolyte of said electrochemical cell and means for measuring current flowing from said sensing electrode to said counterelectrode which measured current is a measure of the concentration of the noxious gas being detected.
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Energetics Science, Inc.
Tung T.
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