Colorimetric testing and measuring device for hydride gas
US5075081A · kind A · utility
0Cited by
1References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1990 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Sep 19, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N31/224
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is directed to a testing and measuring device for colorimetrically detecting hydride gases on a carrier which is impregnated with a solution of glycol and with a salt as an indicator. This measuring device is improved in that its long-term stability is increased and the detection of especially the smallest quantities is made possible by a clearly recognizable color change. For this purpose, only a salt, palladium chloride or palladium tetramine chloride, is present in the solution in addition to the glycol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.