Twenty grams of aspartame sweetened flavoured milk (pasteurized or in-bottle sterilized flavoured milk) was accurately weighed in a 100 ml beaker and 50 ml of water was added to it. The mixture was placed in an ultra sonication bath at 40 ° C /20 min. 2 ml of carrez solution no. 1 was added and mixed, followed by addition of 2 ml of carrez solution no. 2.