Food tests

• Reducing sugars test


  1. Take 5cm³ of sample

  2. Add 10 drops of Benedict’s solution

  3. place in water bath (75) for 5 mins

  6. If present, solution will go from green, yellow then brick red
• Starch test


  1. Take 5cm³ of sample

  2. Add a few drops of iodine solution

  3. solution will go browny orange. shake, if present will go blue/black
• Protein test


  1. Take 2cm^3 of sample and 2cm of biuret

  2. shake, solution will go blue. if present, will go pink or purple
• Lipids/fats test


  1. Take 5cm³ of sample (not filtered)

  2. Add 3 drops of ethanol

  3. Give shake

  4. If solution goes cloudy, lipids/fats are present