Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1994-04-25
1995-11-14
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
20415316, 20415318, G01N 2726
Patent
active
054663504
ABSTRACT:
A thin film, solid sate amperometric detector for mac oxide is provided based upon a mobile cation electrolyte that selectively transmits nitrosonium cations (NO.sup.+) therethrough. The presently most preferred embodiment employs NO-.beta.-alumina as the mobile cation electrolyte. The electrodes of the detector are preferably arranged in a bipotentiostat arrangement. The first and second working electrodes share a common reference electrode and a common counter electrode, which are positioned such that the potentials of the first and second working electrodes can be independently controlled. The first working electrode is exposed to a fluid (liquid or gaseous), whereas the second working electrode is normally isolated from the fluid. The first working electrode is set at a potential capable of oxidizing NO to NO.sup.+, the NO.sup.+ moves through the mobile cation solid electrolyte to the second electrode, and the second working electrode is set at a potential capable of reducing the NO.sup.+ back to NO. The detector has a diffusion barrier for the nitric oxide so that the voltage-current characteristics of the detector under diffusion limiting conditions are proportional to the concentration of nitric oxide in a fluid.
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Baker Charles K.
Ram Mohan R. A.
Willinghoff Stephen T.
Bell Bruce F.
Niebling John
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