Fluorescent N-alkylated acrylamide copolymers and optical pH sensors
US6252024A · kind A · utility
4Cited by
6References
10Claims
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Key dates
| Filing date | Nov 2, 1998 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Nov 2, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/15
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A water-insoluble copolymer which is composed of (a) from 39.9 to 60% by weight of N,N-dimethylacrylamide or N,N-dimethylmethacrylamide; (b) from 60 to 39.9% by weight of N-alkylated acryl amides or N-alkylated methacryl amides; (c) from 0.1 to 0.7% by weight of a proton-sensitive fluorophore which is covalently bonded to the copolymer; and (d) from 0 to 20% by weight of a diolefinic crosslinking component. The copolymer is used in the form of a membrane on a transparent support material as an optical sensor for ionic strength-independent pH value determination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.