Food tests

• Food test practical preparation

  start by breaking down the food using a pestle and morta.

  transfer the ground food into a beaker with distilled water.

  stir the mixture to dissolve some food particles.

  filter the mixture to remove solid residues.
• Testing for starch iodine solution 


  A color change from brown-orange to blue-black present of starch
• Testing for proteins biuret test 


  A change to purple indicates protein. If no protein the so remains blue.
• Testing for lipids Sudan 111 test 


  Gently shake tube lipid presence will show as a separate bright red layer.