Influence of Spray-Drying Conditions on Size and Size Distribution of Nonfat Dry Milk Particles

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Particle size and size distribution of nonfat dry milk was determined by microscopic, sieve, and Coulter Counter methods. Data obtained by using the microscopic method indicated the smallest mean particle size, while data from the sieve method indicated the largest mean size. Results of the Coulter Counter method were changed slightly by the aperture size, but usually the curve was located between the results of the microscope and sieve.