Food tests

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  • FOOD TESTS
    • STARCH
      • few drops of iodine
        • Brown to blue/black
    • REDUCING SUGAR
      • Benedict's solution and heat to 80 degrees
        • Blue to orange/red
    • NON REDUCING SUGAR
      • if reducing sugar test fails
        • *boil with HCl *cool  *neutralise with sodium carbonate solution
          • Benedict's solution and heat to 80 degrees
            • Blue to orange/red
    • PROTEIN
      • add biuret reagent
        • Blue to lilac
    • LIPID
      • add ethanol to sample in test tube
        • pour sample into test tube of water
          • milky white emulsion forms

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