Method for assaying cationic polymers by time-resolved photoluminescence
US11287378B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2018 |
| Grant date | Mar 29, 2022 |
| Priority date | — |
| Expiry date | Dec 24, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/582
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention concerns a method for determining the concentration of cationic polymers present in a sample, according to the following steps: —bringing the cationic polymer or polymers present in the sample into contact with, and enabling the interaction thereof with, a developer solution comprising lanthanide (III) ions and at least one bonding agent, and —exciting the sample at an excitation wavelength λexc and detecting, by time resolved photoluminescence, a signal originating from the lanthanide (III) ions having interacted with the at least one bonding agent having previously interacted with the cationic polymer or polymers, at an emission wavelength λem, and —determining the cationic polymer concentration of the sample by using the signal detected at the emission wavelength λem, the sample originating from water originating from municipal or industrial water or sludge treatment processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.