Methods for measuring hydrophobic contaminants in pulp slurries or paper systems

Methods for measuring hydrophobic contaminants in a pulp slurry or paper system include providing an aqueous paper mill sample， filtering the aqueous paper mill sample to produce a filtrate comprising particles， and measuring the volume of particles in the filtrate. And collecting the image. The method also analyzes the image to determine the size and morphology of the particles in the measured volume of filtrate， identifying spherical particles having a size of about 1 micrometer to about 20 micrometers in the measured volume of filtrate. And quantifying the number of spherical particles having a size of about 1 micrometer to about 20 micrometers in the measured volume of filtrate. This method is useful for papermakers in deposit diagnosis， prevention， and optimization of contaminant control treatments. A method of measuring hydrophobic contaminants in a pulp slurry or a papermaking system includes the steps of providing an aqueous paper mill sample， filtering the aqueous paper mill sample to produce a filtrate comprising particles， and collecting an image of the particles in a measured volume of the filtrate. The method also includes the steps of analyzing the image to determine a size and morphology of the particles in the measured volume of filtrate， identifying spherical particles having a size of from about 1 micron to about 20 microns in the measured volume of filtrate， and quantifying a number of the spherical particles having the size of from about 1 micron to about 20 microns in the measured volume of filtrate. This method is useful for papermakers for deposition diagnostics， prevention， and contaminant control treatment optimization. A method of measuring hydrophobic contaminants in a pulp slurry or a papermaking system includes the steps of providing an aqueous paper mill sample， filtering the aqueous paper mill sample to produce a filtrate comprising particles， and collecting an image of the particles in a measured volume of the filtrate. The method also includes the steps of analyzing the image to determine a size and morphology of the particles in the measured volume of filtrate， identifying spherical particles having a size of from about 1 micron to about 20 microns in the measured volume of filtrate， and quantifying a number of the spherical particles having the size of from about 1 micron to about 20 microns in the measured volume of filtrate. This method is useful for papermakers for deposition diagnostics， prevention， and contaminant control treatment optimization.