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Studies of Heated Milk. II. Acetol and Related Compounds¹

Department of Dairy Husbandry, The Pennsylvania Agricultural Experiment Station, State College

ABSTRACT

This study has demonstrated the presence of acetol and acetic acid in autoclaved condensed skim milk. The results of adequate control experiments preclude that these compounds are present in significant amounts in unheated milk. Presumptive but not conclusive evidence that acetaldehyde is formed during the heating of milk also was obtained.

The relationship of acetol to methylglyoxal and certain other compounds known to be. present in heated milk is discussed.

A wide variety of carbonyl compounds were observed to be formed during the prolonged heat treatment of milk. These compounds, for the most part, have not yet been identified.

¹ Authorized for publication as paper no. 1590 on March 23, 1950 in the Journal Series of the Pennsylvania Agricultural Experiment Station.

² Present address: M and R Dietetic Laboratories, Inc., Columbus, Ohio.