Abstract
Abstract The modified rapid detergent (TeSa), AOAC Roese-Gottlieb, and Babcock methods for determining butterfat were compared in a collaborative study on 8 samples of homogenized milk by 6 laboratories. The modified rapid detergent and Roese- Gottlieb methods were also compared on 4 samples of chocolate milk by the same collaborators. There was a statistically significant difference between the Roese-Gottlieb and detergent methods in 5 laboratories for homogenized milk and in 4 laboratories for chocolate milk. Additional developmental work is necessary before the detergent method can be applied to homogenized and chocolate milk
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