give a test of proteins
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Food Test 2: Protein - Biuret solution
Biuret solution is used to identify the presence of protein. Biuret reagent is a blue solution that, when it reacts with protein, will change color to pink-purple.
What to do.
To a test tube, add 40 drops of liquid to be tested.
If testing more than one liquid, label each test tube with a marker.
Add 3 drops of Biuret reagent solution to each test tube. Shake gently to mix.
Note any color change. Proteins will turn solution pink or purple.
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