Photometric Milk Fat Determination

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Abstract
Theoretical considerations and practical application are presented. Casein turbidity is eliminated chemically and coherent scattering is eliminated by dilution of milk samples. Using a visible wavelength of light, fat content and average globule size are determined simultaneously by measuring 2 independent resultant light intensities through a thin layer of the prepared sample. A nomogram is used to determine the 2 characteristics of a milk sample from photometric readings. Results for a number of commercial samples along with Babcock comparative values are given.