Chemical tests

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  • Created by: Krystina
  • Created on: 17-04-13 22:44
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  • Chemical tests
    • Reducing surgars
      • Negative result, colour remains blue
      • Benedict's reagent
      • Heat in water bath
      • Positive result, colour goes redish
    • Starch
      • Iodine solution
      • Positive result, colour changes blue-black
      • Negative result, colour remains orange-brown
    • Protein
      • Biuret reagent
      • Do not heat
      • Positive result, colour changes purple
      • Negative results, colour stays blue
    • Lipids
      • Ethanol or lipids will leave a translucent stain on filter paper
      • Negative result, no emulsion will be formed
      • Positive result, a cloudy white emulsion will be formed


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