food tests

• testing for sugar


  reagent = benedicts

  add benedict's to the food and boil in a water bath

  blue - black to brick red
• testing for starch 


  reagent = iodine

  add iodine to food

  yellow - brown to blue - black
• testing for proteins / amino acids

  reagent = biuret

  add biuret to food

  blue to lilac
• testing for fat


  reagent = ethanol

  add ethanol to dissolve the fat then add water

  colourless to white emulsion