Electrochemical measuring cell for detecting gas components in a fluid medium
US5128018A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1990 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Dec 14, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to an electrochemical measuring cell for detecting selected gaseous components such as hydride gases, sulfur dioxide and nitrogen dioxide by means of at least one measuring electrode and a counter electrode disposed in an electrolyte. The electrodes and the electrolyte are accommodated in a measuring chamber which is closed off 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 the measuring sensitivity as well as the selectivity are increased. For this purpose, the electrolyte includes an additive catalyzing the oxidation of the substance to be detected. The additive contained in the electrolyte can be inorganic heteropoly acids or iron salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.