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Current Status of the Milko-Tester

Department of Food Science Cornell University, Ithaca, New York 14850

ABSTRACT

Introduction

The Milko-Tester is a product of Danish ingenuity. Haugaard (7), a Danish scientist working for National Dairy Products Corporation, published a photometric method for determining fat in 1959. In 1962 the Foss Electric Co., Hillerød, Denmark, began selling the Milko-Tester—a photometric instrument for determining fat in milk. This instrument measures the light scattered by fat globules in a diluted milk sample. Theoretically, such measurements have been discussed by Haugaard (7) and Walstra (18, 19). Briefly stated, the amount of light scattered is dependent on number and size of fat globules. If size distribution is uniform the amount of light reaching the photocell will be proportional to the fat content.

Comparisons

Several investigators have compared the Milko-Tester with the Röse-Gottlieb (1, 5), Gerber (2, 3, 5, 6, 9–13, 16), Babcock (4, 8, 14, 15), or Werner Schmid (9) methods. These workers concluded that results with the Milko-Tester are comparable to those with the reference method. However, on some occasions there have been significant differences between methods.