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1. (WO2018178528) METHOD FOR ASSAYING CATIONIC POLYMERS BY TIME-RESOLVED PHOTOLUMINESCENCE

Pub. No.:    WO/2018/178528    International Application No.:    PCT/FR2018/050412
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Thu Feb 22 00:59:59 CET 2018
IPC: G01N 21/64
G01N 33/542
G01N 33/58
Applicants: S.P.C.M. SA
Inventors: FAVERO, Cédrick
SOUZY, Renaud
BRAUN, Olivier
GUILLARD, Alexis
Title: METHOD FOR ASSAYING CATIONIC POLYMERS BY TIME-RESOLVED PHOTOLUMINESCENCE
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.