Electrochemical measuring cell for detecting arsine and phosphin

Details Electrochemical measuring cell for detecting arsine and phosphin Electrochemical measuring cell for detecting arsine and phosphin

1998-04-09

1999-12-07

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

205775, G01N 27404

Patent

active

05997706&

ABSTRACT:
An electrochemical measuring cell for detecting arsine and phosphine, containing at least one working electrode (3) consisting of a catalytically inactive material and a reference electrode (4) in an electrolyte space (6), which is filled with an aqueous electrolyte (9) and is sealed with a gas-permeable membrane (2) toward the gas to be detected, shall be improved in terms of the cross sensitivity to other gases. To accomplish this object, the working electrode (3) is designed as a thin-layer electrode and the electrolyte (9) consists of sulfuric acid with an electrolyte additive consisting of silver sulfate.

REFERENCES:
patent: 3622488 (1971-11-01), Chand et al.
patent: 3668101 (1972-06-01), Bergman
patent: 3756923 (1973-09-01), Dahms
patent: 4406770 (1983-09-01), Chan et al.
patent: 5128018 (1992-07-01), Kiesele

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