Food tests

• reducing sugars test

  Add benedict's reagent

  heat mixture in water bath for 5 mins

  positive will turn brick red - high concentration, orange-medium concentration and green- lo concentration
• non-reducing sugars test

  add benedict's reagent and heat in water bath for 5 mins, tests negative

  add dilute hydrochloric acid and put in water bath to boil

  add sodium hydrocarbonate and check pH with litmus paper

  add benedict's solution and heat in water bath

  positive result- green,orange,brown and red
• Starch test

  add 2 drops of iodine solution and shake

  positive result- blue/black
• Lipids test

  add ethanol and shake

  add water and shake

  positive result-cloudy emulsion
• Protein test

  add biuret solution and mix

  positive result- lilac