Detection of impurities in gas streams
US7752887B2 · kind B2 · utility
0Cited by
6References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2008 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | Oct 18, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring the level of an impurity in a gas comprises providing a gas detection tube having a internal volume containing a reagent which can react with said impurity to produce a compound capable of producing a color change in said tube such that the extent of the color change is proportional to the concentration of the impurity in said gas. A volume of the gas at least 1×103 times the test volume of the gas detection tube is passed through the tube and the extent of the color change of the detector element is measured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.