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5 Cards in this Set
- Front
- Back
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food test for lipids
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ethanol emulsion tests
-add ethanol -pour into the test tube with water = white emulsion formscwhere two layers meet |
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food test for starch
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iodine solution test
-add a few drops of iodine solution = from orange to blue/black |
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food test for reducing sugar
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benedict's test
-add an equal volume of benedict's solution -heat to 80°C for 5 mins = from blue to brick red precipitate |
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food test for protein
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biuret test
- add a few drops of biuret reagent (breaks peptide bonds) = from blue to lilac |
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food test for non reducing sugar
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-benedict's test to ensure that no reducing sugar is present
- add equal volume of hydrochloric acid -boil for 2 mins -cool and neutralise with sodium carbonate -carry out benedict's test again = from blue to brick red precipitate |
