ISO 11868 | IDF 147:2007规定了一种通过高效液相色谱法测定加热牛奶、脱脂牛奶、部分脱脂牛奶或全脂牛奶中乳果糖含量的方法，以区分通过超热处理（UHT）灭菌的牛奶和瓶内灭菌牛奶。 该方法的乳果糖含量范围为200 mg/l至1500 mg/l，适用于所有热处理牛奶。 所述方法适用于有争议的情况。

ISO 11868|IDF 147:2007 specifies a method for the determination of the lactulose content of heated milk, skimmed, partially skimmed or whole milk, by high-performance liquid chromatography, in order to distinguish milk sterilized by ultra-heat treatment (UHT) from in-bottle sterilized milk. The method has been tested over a lactulose content range of 200 mg/l to 1 500 mg/l and is applicable to all heat-treated milks. The method described is to be used in cases of dispute.