Electrochemical measuring cell for detecting hydrogen cyanide or

Details Electrochemical measuring cell for detecting hydrogen cyanide or Electrochemical measuring cell for detecting hydrogen cyanide or

1990-06-26

1991-08-20

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

20415314, 20415317, 20415319, G01N 2740

Patent

active

050412043

ABSTRACT:
The invention is directed to an electrochemical measuring cell for detecting hydrogen cyanide or sulfur dioxide by means of at least one measuring electrode and a counter electrode disposed in an electrolyte. The electrolyte is accommodated in a measuring chamber closed off with respect to the ambient by a membrane permeable to the substance to be detected. This measuring cell is improved in that the long-term stability of the measuring signal is increased and a corrosion of the electrodes is prevented. For this purpose, the electrolyte in the electrolyte chamber contains an additive of copper salts for catalyzing the oxidation of the substance to be detected.

REFERENCES:
patent: 3795589 (1974-03-01), Dahms
patent: 4169779 (1979-10-01), Tataria et al.
patent: 4227974 (1980-10-01), Petersen et al.
patent: 4521290 (1985-06-01), Venkatasetty
patent: 4756804 (1988-07-01), Driscoll et al.

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