Testing For Nutrients Practical

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  • Practical - Testing Food for Nutrients
    • Safety
      • safety specs must be worn
      • lab coat must be worn
      • Hair must be tied up
    • Solutions
      • Biuret Solution
        • corrosive
      • Benedicts Solution
        • harmful
      • Iodine
        • stains the skin
      • Sudan III
        • flammable
      • Water Bath
        • very hot!
    • Starch
      • 1.  Add a drop or piece of your sample to a spotting tile
      • 2. Add a drop of iodine to your sample
      • 3. Positive result will show blue or black colour
    • Sugar
      • 1. Add your sample to a test tube
      • 2. Add 5cm cubed of Benedicts Solution to your sample and place in the hot water bath for 2 to 5 mins
      • 3. Positive result will show a lilac colour
    • Protein
      • 1. Add your sample to a test tube
      • 2. Add 5cm cubed of biuret solution to your sample
      • 3.Positive result will show a lilac colour
    • Lipids
      • 1.Add your sample to test tube
      • 2. Add 5cm cubed of Sudan III to your sample
      • 3. Then add 5cm cubed of water, place a bung on the top and shake.
      • 4. Positive result will show a red ring at the top of the tube

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