pH-sensitive optrode
US4803049A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1984 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Dec 12, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/7786
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus is provided for remotely monitoring pH. A support material is provided on which organic dye molecules are covalently attached at a surface density falling within a predetermined range. The pH dependent fluorescence response of the bound organic dye molecules depends critically on surface density of the organic dye molecules bound to the support material and the nature of the covalent linkage betwen the organic dye molecules and the support material. The invention is operated by contacting the support material on which the organic dye is attached with the fluid whose pH is to be determined. When in contact, the organic dye on the support material is illuminated so that it is caused to fluoresce. The intensity of organic dye fluorescence is then related to pH.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.