Method and apparatus for determining concentration of NH-containing species
US6509194B1 · kind B1 · utility
0Cited by
2References
13Claims
0Family size
Inventor
Key dates
| Filing date | Jul 24, 2000 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Jul 24, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/25875
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determining ammoniacal species concentration in a gas sample. In one embodiment, trace concentration of ammonia in an air sample is determined by monitoring emission intensity from an excited radical species (NH*), which is produced in a reaction between ammonia and fluorine. The observed emission intensity is compared with calibration data obtained from previously analyzed gas samples containing ammonia. The method and apparatus can also be adapted to detect ammoniacal species concentration in other NH-containing gas samples.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.