Equipment: Test tube, sodium hydroxide (NaOH), copper sulfate (CuSO4), food sample.
Method:
* Place about 2mL of the sample into a test tube and add 5 drops of sodium hydroxide.
* Add 5 drops of copper sulfate.
* shake the test tube gently form side to side.
Results: If the solution remains blue, then no protein is present. If the solution changes to a Purple colour then protein is present in the sample.
Here are our results:
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