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How will you test the presence of protein in a food item?

Posted by Harshal Patil 4 years, 6 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Meghna Thapar 4 years, 6 months ago

Test for protein:

Take 2 ml of the given food-stuff solution in a test tube.
Add a little of dilute sodium hydroxide solution till the mixture clears.
Then add 2 to 3 drops of copper sulphate solution and shake well.
If a violet colour appears in the solution, then protein is present in the given food-stuff.

Note: If the food item to be tested is in solid form, then a powder or a paste is made by grinding it and adding few drops of water in a test tube. Afterwards, the test tube is made to shake well to form a solution or suspension.

1Thank You

ANSWER

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