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PLATFORM TESTS

Pargi hiren ROLL NO.

Platform tests Objectives: For examination of milk by adopting rapid test for acceptance / rejection of incoming milk.

Relevant Information: Platform tests include the tests for judging the quality of the raw milk. These are: (a) organoleptic evaluation (OE) (b) Clot on boiling test (COP) (c) Alcohol test (AT) (d)alcohol – alizarin test (e) Resazurin test (RT)

Organoleptic Evaluation Examine the given sample of milk and record observations on following aspects.

Odor / Smell: 1. it can be judged within few seconds. 2 Remove the lid of can hold it inverted and raised to the nose and inhale the smell. 3. Record the odor / smell as normal or abnormal. 4. Milk should be free from any off flavor like feed, fishy, barny etc.

General Appearance: Note whether the milk is clear or any visible dirt or foreign matter has gained entrance in milk. If so describe its nature for detecting the amount of dirt, in the milk, conduct the sediment test if necessary.

Color:

Observe the color of milk as white, light yellow; record whether color of milk is normal or abnormal. (Abnormal colors are reddish, bloody, bluish etc.)

Consistency: Record the consistency of milk as normal, watery, thick, ropy, and slimy.

Temperature: Note down the temperature of milk at the time of receiving. It should be below 50° F.

Clot on Boiling (C.O.B) Test The test is quick and simple. It is one of the old tests for too acid milk (pH