Device for the continuous determination of carbon monoxide conte

Details Device for the continuous determination of carbon monoxide conte Device for the continuous determination of carbon monoxide conte

1975-05-23

1977-07-19

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

204195P, 204 1T, G01N 2746

Patent

active

040367240

ABSTRACT:
The device continuously determines the carbon monoxide content of air in the emission and immision range, and comprises an electrochemical cell including an acid electrolyte with a cathode and a diffusion anode in the electrolyte, the anode being depolarizable by carbon monoxide in the acid electrolyte. A current measuring device measures the current between the anodeand the cathode responsive to detection of a gas containing carbon monoxide effective on the diffusion anode. The cathode is made of an unpolarizable material whose oxidation potential is so high that no oxygen reduction takes place at the anode. The cell functions without an external current source, and the current measuring device is connected to directly across the anode and the cathode. The cathode contains substances with an oxidation potential of from 1000 to 1300 millivolts relative to a hydrogen electrode in the same electrolyte. The cathode advantageously contains oxides or mixed oxides of transition metals, or manganates, or cobaltates, a preferred material for the cathode being manganese dioxide (MnO.sub.2).

REFERENCES:
patent: 3287169 (1966-11-01), Rogers
patent: 3432355 (1969-03-01), Niedrach et al.
patent: 3622487 (1971-11-01), Chand
patent: 3649361 (1972-03-01), Paynter et al.
patent: 3852169 (1974-12-01), Kring et al.
Jasimshi, "High-Energy Batteries", 1967, pp. 79-81.
Hamill et al., "Principles of Physical Chemistry", 1959, p. 425.

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