Food Tests

During our Biology class we went to the lab where we tested milk for, starch, using iodine solution, reducing sugars, using benedict solution and also proteins using biuret solution and bioling it for two minitues. Our conclusion were that milk does not contain starch, it contains reducing sugars and proteins. We completed the charts below and took some pictures during and after the expirement.

SAMPLE REAGENT COLOUR BEFORE INVESTIGATION COLOUR AFTER INVESTIGATION CONCLUSION
A Iodine Solution White Orange Starch is not present
B Benedict Solution White Purple Milk contains reducing sugars
C Biuret Solution White Orange/Yellow Proteins are present

 

REAGENT NEGATIVE POSITIVE
Test for starch iodine solution Orange Black
Test for protein biuret solution Blue Orange/Yellow
Test for reducing sugars benedict solution Blue Purple

This are all three different test tubes with milk and the different solutions we used to test for components.

These are all the test tubes when the tests are completed, we can see that milk only contains reducing sugars and proteins.

  These are the test tubes when the solutions are added 

Deja un comentario

Tu dirección de correo electrónico no será publicada. Los campos obligatorios están marcados con *