Method for determining ammonia and sensor therefor
US4297173A · kind A · utility
21Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1980 |
| Grant date | Oct 27, 1981 |
| Priority date | — |
| Expiry date | May 22, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/175383
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
The concentration of ammonia in an aqueous liquid is determined by contacting a sample of the liquid with dissolved oxygen and with a microbial electrode comprising an oxygen-sensitive electrode, a porous membrane, and nitrifying bacteria confined or immobilised by the membrane which are in direct or close contact with the diaphragm of the electrode. The rate of oxygen consumption under otherwise uniform conditions is as precise a measure of concentration of ammonia as a conventional colorimetric method and distillation-titration method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.