TEST FOR PRESENCE OF UREA IN MILK

TEST FOR PRESENCE OF UREA IN MILK

AIM:
To detect adulteration of milk with urea.

APPARATUS:
Test tubes, dropper.

REAGENT:
Para-dimethylaminobenzaldehyde (PDAB) reagent.

PRINCIPLE:
Urea reacts with PDAB to form a yellow color.

PROCEDURE:

• Add 5ml milk sample in a test tube.

• Add 2ml of PDAB reagent.

• Observe for yellow color development.

RESULT:
Yellow color indicates presence of urea.