food tests

• Iodine test-starch

  pour idodine into dimples

  place food samples into other dimples and pour idoine into the food samples

  If strach is present it will go from red to blue/black
• Emulsifusion:lipids

  Ad food samples to test tube

  ad 2cm3 of ethanil

  then shake

  then ad 2cm3 of water

  then shake if lipids are present it will turn from clear to clouds white
• Biuret test:proteins

  add sodium hydroxide to a test tube followed by some copper sulfphate

  ad the food samples and if protein is present then it will turn from blue to purple
• Benedicts test:Glucose

  Add food samples to test tube

  ad benedicts regant into the test tubes (same volume)

  then add boilinmg water to a beaker and place the the test tube inside the beaker

  if glucose is present it will turn from blue to dark orange or red
• if glucose is prsent it will turn from Blue to red or dark orange
• if Lipids is present it will turn from CLEAR to cloudy white
• if proteins are present it will turn from BLUE to purple
• If strach is present it will turn from RED to blue-black