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Tuesday, July 30, 2019

Testing For Protein - The Biuret Test

Aim: To test if a sample of food contains protein

Method:
1. Place about 2mL 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

Results: If the solution remains blue, then no protein is present. if the solution changes to a to a purple colour then protein is present in the sample.

Conclusion: 










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