Patent · US Expired

Electrochemical measuring cell for detecting hydrogen cyanide or sulfur dioxide

US5041204A · kind A · utility

9Cited by

5References

10Claims

0Family size

Assignee

DRAGERWERK AKTIEGESELLSCHAFT · DE

Inventors

Uwe Kuhn · Riederich, DE
Herbert Kiesele · Lübeck, DE
Stephan Haupt · Lübeck, DE

Key dates

Filing date	Jun 26, 1990
Grant date	Aug 20, 1991
Priority date	—
Expiry date	Jun 26, 2010

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/4045
WIPO fieldMeasurement
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.