BSI 21/30376372 DC:2021 Edition

This document specifies the method for the determination of the fat content.

The method is applicable to:

• raw milk (cow, sheep, goat), reduced fat milk, skimmed milk, chemically preserved milk and processed liquid milk;

• dried milk products (e.g. whole, partially skimmed, skimmed milk powder; dairy permeate powder; whey powder; blend skimmed milk powder and vegetable fat; milk based infant formula powder);

The method is not applicable when the powder contains hard lumps which do not dissolve in ammonia solution. When the powder contains hard lumps which do not dissolve in ammonia solution, noticeable by a distinct smell, the result of the determination will be too low. In such cases, a method using the Weibull-Berntrop principle is suitable, for example ISO 8262-3 | IDF 124-3 .

• raw and processed cream;

The method is not applicable to sour creams, for fat quality and low pH reasons. If the method is not applicable and when separation or breakdown of fat occurs, a method using the Weibull-Berntrop principle is suitable, for example ISO 8262-3 | IDF 124-3 .

The method could be applicable to the following products:

• evaporated milk and sweetened condensed milk (e.g. liquid sweetened and unsweetened concentrated milk);

• whey cheese as defined in Codex STAN 234.

The method could not be applicable to products which do not dissolve completely in ammonia solution. If the whey cheese does not dissolve completely in ammonia solution, the result of the determination will be too low. With such products, a method using the Weibull-Berntrop principle is suitable, for example ISO 8262-3 | IDF 124-3 .

• liquid whey and buttermilk;

• milk-based edible ices and ice mixes;

• milk base edible ices and ice mixes.

The method could not be applicable to milk-based edible ices and ice mixes in which the level of emulsifier, stabilizer or thickening agent or of egg yolk or of fruits, or of combinations of these constituents that makes the Röse-Gottlieb method unsuitable. With such products, a method using the Weibull-Berntrop principle is suitable, for example, ISO 8262-2 | IDF 124-2 .

• liquid, concentrated infant foods.

The method could not be applicable to products which do not dissolve completely in ammonia due to the presence of starch or dextrin at mass fractions of more than 5 % (in dry matter), or to the presence of hard lumps. For such products, a method utilizing the Weibull-Berntrop principle is suitable, for example ISO 8262-1 | IDF 124-1 .