Dried tetramethoxysilane sol-gel containing a leachable reagent
US6232090A · kind A · utility
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18Claims
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Key dates
| Filing date | Nov 16, 1998 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Nov 16, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/552
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
First and second reactants that give a signal when mixed in the presence of an analyte in a liquid sample, are separately contained in sol-gels that release the reactants in the presence of the liquid. For example, when the first and second reactants respectively comprise an oxidant and a reductant, and the reaction provides a detectable signal, the system can be used to detect the presence of contaminants in a water sample. The sol-gel may be obtained by reaction of water with, per part by volume thereof, at least 2 parts of a metal alkoxide, and drying the resultant gel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.