Testing for Protein - the Biuret Test

Aim: To test if a sample of food contain's protein.

Equipment: Test tube, sodium hydroxide (NaOh), copper sulfate (CuSo), food sample.

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.






Results: the colour changed witch showed protein.

Conclusion: there was protein in the egg.