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A Comparison of the Babcock, Gerber, Minnesota, Pennsylvania, and Mojonnier Methods for Determining the Percentage of Fat in Homogenized Milk¹

Michigan Agricultural Experiment Station, East Lansing, Mich.

ABSTRACT

The general acceptance of homogenized milk today has made imperative a study of the existing methods for testing it for butterfat. Extensive studies have been made by several workers on the various methods of testing nonhomogenized milk for butterfat, but the data are somewhat limited when the methods are applied to homogenized milk.

LITERATURE

The Roese-Gottlieb (Mojonnier) Method

Burr (6), comparing several methods for testing homogenized milk for fat, found the Roese-Gottlieb method the most accurate. This test was so considered by all the chemists at that time. Richmond (28) pointed out that for ease and accuracy the Roese-Gottlieb method appeared to be the best method for determining the percentage of fat in homogenized milk. Marquardt (23) stated that ether extraction methods gave the most reliable results when testing homogenized milk for fat. Doan (12) stated that the homogenization process did not influence the accuracy of the Roese-Gottlieb or the Mojonnier methods.

¹ Journal Article no. 841 (n.s.), Michigan Agricultural Experiment Station.