Food tests

• To test for starch

  Add a drop of iodine on pasta

  • Colour change was brown to black.
• To test for reducing sugar (glucose)


  Dissolved in little water and added to Benedict’s solution in a test tube.

  • Benedicts solution was also added to water ( control )
  • both heated.
  • Positive test: Blue to brick red
• To test for fats/lipids

  Oil on brown paper and let it dry.

  • water on brown paper and let it dry.
  • Translucent spot forms on the brown paper when the oil dries
  • Nothing on the brown paper with water
• To test for protein


  Pour milk into the buiret solution

  • Pour water into buiret solution.
  • Result: Colour change of blue to purple.