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((Ethanol emusion test, add 2cm3 of ethanol to a drop of liquid sample in…
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- add 2cm3 of ethanol to a drop of liquid sample in a
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- on samples in solid state
a. crush the solid sample into small pieces using a mortar and pestle and place the pieces in a test tube
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c. allow the solid particles to settle. carefully decant the ethanol ( pour off the top layer of ethanol) into
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- add 2cm3 of benedict's solution to the food sample
- shake the mixture and place the test- tube in a boiling water-bath
- Record the colour of the solution
no reducing sugar, solutions remained blue
traces of reducing sugar, benedicts solution turned from blue to green
moderate amounts of reducing sugar, solution turns from blue to yellow/ orange
large amounts of reducing sugar, solution turns red to blue
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- add an equal volume of biuret solution
- shake well and allow the mixture to stand for 5 mins
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- add 2cm3 of ethanol to a drop of liquid sample in a
-
-
-
- on samples in solid state
-
a. crush the solid sample into small pieces using a mortar and pestle and place the pieces in a test tube
-
c. allow the solid particles to settle. carefully decant the ethanol ( pour off the top layer of ethanol) into
-
-
-
no reducing sugar, solutions remained blue
traces of reducing sugar, benedicts solution turned from blue to green
moderate amounts of reducing sugar, solution turns from blue to yellow/ orange
large amounts of reducing sugar, solution turns red to blue
-
-
- add 2cm3 of benedict's solution to the food sample
- shake the mixture and place the test- tube in a boiling water-bath
- Record the colour of the solution
- add an equal volume of biuret solution
- shake well and allow the mixture to stand for 5 mins
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