Surfactant sensing electrode for potentiometric titrations
US4810331A · kind A · utility
5Cited by
21References
21Claims
0Family size
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Key dates
| Filing date | Oct 13, 1987 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Oct 13, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/3335
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A coated-wire electrode for potentiometrically titrating surfactant molecules having more than ten carbon atoms includes an electrically-conductive core coated with a semipermeable membrane. The membrane matrix includes a polymer a plasticizer and an ion-exchanger material consisting essentially of dimidium bromide-disulphine blue in suitable proportions to be surfactant selective. The membrane is responsive to anionic, cationic and amphoteric surfactants as well as alkoxylated nonionic surfactants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.