Method and device for the determination of polymeric biguanides in aqueous fluids
US5498547A · kind A · utility
5Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 1994 |
| Grant date | Mar 12, 1996 |
| Priority date | — |
| Expiry date | May 24, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/19
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A test method and device is described for determining biguanides in aqueous fluids such as swimming pool water which involve contacting the fluid with a matrix incorporating a pH sensitive indicator material which exhibits the biguanide error effect. A buffer is advantageously used to maintain the test system within a defined constant pH range to eliminate the effect of pH changes on the test system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.