Process for reducing interfering signals in optical measurements of water vapor
US5804702A · kind A · utility
5Cited by
11References
52Claims
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Key dates
| Filing date | Feb 14, 1997 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Feb 14, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/3554
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process for improving moisture analyzers or hygrometers that use optical absorption techniques to measure water vapor. Water vapor in the optical path outside the sample region is treated to exchange the hydrogen atoms for deuterium, so that the adsorbed water vapor is converted to heavy water, D.sub.2 O, and isotopically mixed HDO, thus reducing or eliminating the interference in any optical absorption apparatus for measuring water vapor, provided the spectral resolution is sufficient to resolve normal water absorptions from heavy water absorptions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.