公开(公告)号：US12044607B2

公开(公告)日：2024-07-23

申请号：US17418510

申请日：2019-12-20

Applicant: KEMIRA OYJ

Inventor： Iiris Joensuu ,  Marjatta Piironen ,  Andy Bergeron ,  Travis Bjerketvedt

IPC: G01N15/06 ,  G01N15/075 ,  G01N33/34

CPC classification number: G01N15/06 ,  G01N33/343 ,  G01N15/075

Abstract: A sample of an aqueous stream is conducted to an optical measurement device. A hydrophobic dye is added. The sample is fractionated into fractions according to particle size or mass. Fluorescence intensity values and light scattering intensity values for the fractions are measured. Fluorescence intensity values of the fractions are added together thus obtaining a sum of the fluorescence intensity values. Light scattering intensity values of the fractions are added together, thus obtaining a sum of the light scattering intensity values. A hydro-phobicity density of the particles in the sample, is calculated by dividing the sum of the fluorescence intensity values with the sum of the light scattering intensity values. A concentration of hydrophobic contaminants in the aqueous stream is monitored and controlled based on the calculated hydrophobicity density of the particles in the sample.