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How will you test for protein …

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How will you test for protein in a food sample

    • Posted by Niharika Sharma 5 years, 5 months ago

    CBSE > Class 06 > Science (OLD)
    • 1 answers

    Yogita Ingle 5 years, 5 months ago

    1. Take a small quantity of the food items to be tested.
    2. Grind/mash/paste/powder the food item.
    3. Put the food item into a test tube.
    4. Add 10 drops of water and shake the test tube.
    5. Using a dropper add two drops of copper sulphate solution to the test tube.
    6. Add 10 drops of caustic soda solution and shake the test tube.
    7. Observe the colour of the mixture.
    8. Violet colour indicates the presence of proteins in the tested food item. 

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