Biuret Test:
Aim: To test if a sample of food contains protein.
Method: 1. Place about 2 ML of the sample into a test tube and add 5 drops of sodium hydroxide. 2. Add 5 drops of copper sulfate. 3. Shake the test tube gently from side to side.
Result: If the solution remains blue, then no protein is present. if the solution changes to a purple colour then protein is present.
Conclusion: Since most of us didn't get it to work it just stayed blue. But if we were able to get it working it was meant to change colour to purple.
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