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Particle size is a geometric characteristic that is usually assigned to material objects with sizes on scale from nanometers to millimeters.
Brief note on Particle Size Measurement and Zeta Potential Particle Size Measurement Particle size is a geometric characteristic that is usually assigned to material objects with sizes on scale from nanometers to millimeters. There are multiple definitions of the particle size depending on the method of its measurement. For instance, sedimentation yields equivalent hydrodynamic particle size. Microscopy provides information on the area projection particle size. In order to reflect innate basis for a particular particle size measurement, three different bases are used: numerical, area and weight. Particle size measurement is an extremely important method for research and development and for quality control in many industries. This includes pharmaceuticals, cement, ceramics, paints, emulsions, etc. Zeta potential is a parameter characterizing electrochemical equilibrium on interfaces. It depends on the properties of the liquid as well as on properties of the surface. It plays an important role in theory of aggregative stability – DLVO theory. Electrostatic repulsion between particles depends on the value of zeta potential. The higher the zeta potential, the stronger the repulsion, and thus the more stable the system becomes. For instance, high zeta potential of the fat droplets in milk prevents them against coalescence. Reduction of it due to addition of acid would lead to cheese formation from coalescence droplets
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