Method and apparatus for determining the concentration of ammonium ions in solution
US5474660A · kind A · utility
2Cited by
9References
11Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 26, 1994 |
| Grant date | Dec 12, 1995 |
| Priority date | — |
| Expiry date | Aug 26, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ammonia gas sensor 16 is housed within a container 14 partially immersed in a solution 2 containing ammonium ions. An electrochemical generator 6, 8, 10 generates hydroxyl ions in a region of the solution 2 adjacent the container 14. This converts ammonium ions to ammonia gas which is sensed by the sensor 16 having passed through a gas-permeable member 12. This sensing provides an indication of the concentration of ammonium ions in the solution 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.