FIELD: measurement.
SUBSTANCE: method of optical measurement of an aqueous stream is characterized by adding a fixed amount of a cationic dye to the aqueous stream, measuring the light absorption or transmittance spectra of the obtained dye-containing stream, and determining the anionic charge of said aqueous stream by processing the obtained light absorption spectrum using mathematical processing including derivation, wherein the minimum or maximum value of the derivative at the maximum absorbance area of the dye is used in calculations so that it correlates with the total charge of the stream. Wherein said aqueous stream contains at least dissolved and colloidal substances.
EFFECT: invention relates to a method of optical measurement of aqueous stream and to processing of measurement results to determine the anionic charge of the stream.
24 cl, 8 dwg
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