Optical sensor for the measurement of pH in a fluid, and related sensing compositions and methods
US5607644A · kind A · utility
35Cited by
1References
40Claims
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Assignee
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Key dates
| Filing date | Jun 10, 1993 |
| Grant date | Mar 4, 1997 |
| Priority date | — |
| Expiry date | Jun 10, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/7786
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical sensor is provided for measuring the pH of a fluid sample. The sensor is formulated using a fluorescent polymer composition comprising a copolymer of a water-dispersable, polyether-containing urethane olefin precursor and a fluorescent monomer species, wherein the ratio of precursor and fluorescent monomer species is such that a predetermined apparent pKa is provided. The sensor is prepared by coating the distal end of an optical waveguide with the fluorescent polymer composition, and curing the copolymer contained in the composition, e.g., by exposure to radiation of a suitable wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.