Fluorescent pH indicators
US5302731A · kind A · utility
20Cited by
1References
2Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 13, 1992 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | Jul 13, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N31/221
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Fluorescent pH indicator compounds which exhibit an increase in fluorescence intensity with decreasing pH. The indicators are derivatives of rhodamine and sulforhodamine type dyes and are particularly useful for measuring pH in acidic environments such as carbon dioxide production by microorganisms and pH of certain acidic intracellular compartments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.