Food Tests

• What is the purpose of Benedict's test?

  To test for sugars
• What color indicates a positive result in Benedict's test?

  Brick red
• What is the method for conducting Benedict's test?

  Add 10 drops of solution, heat for 5 minutes
• What is the purpose of the iodine test?

  To test for starch
• What color indicates a positive result in the iodine test?

  Blue-black
• What is the method for conducting the iodine test?

  Add a few drops of iodine solution and mix
• What is the purpose of the Biuret test?

  To test for proteins
• What color indicates a positive result in the Biuret test?

  Purple
• What is the method for conducting the Biuret test?

  Add 2 cm³ of biuret solution to food sample
• What is the purpose of the Sudan III test?

  To test for lipids
• What indicates a positive result in the Sudan III test?

  Top layer bright red
• What is the method for conducting the Sudan III test?

  Add 3 drops of Sudan III to food sample
• What are the required practicals for food tests?

  • Benedict's test for sugars
  • Iodine test for starch
  • Biuret test for proteins
  • Sudan III test for lipids