DETERMINATION OF THE SALT CONCENTRATION OF AN AQUEOUS SOLUTION

摘要

Method for determining the concentration of a salt possibly present in a product containing at least water, comprising the following steps: a) recording the Raman spectrum of the photons scattered by the product in a wavenumber range of between 2500 and 4000 cm-1; b) determining, for a given temperature of the product, two points of said spectrum corresponding to two specific wavenumber values; c) calculating the ratio of two magnitudes representative of said points, by means of which a measurement ratio is obtained; d) comparing said measurement ratio to a reference graph representative of the concentration of the salt for various temperatures as a function of the concentration of said salt. Advantageously, the method does not require samples to be taken and can be contact-free.