How would you test a substance to see if it contains carbohydrates (sugar)?
Add a few drops of Benedicts solution. In the presence of sugar it will go from blue to orange.
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How would you test a substance to see if it contains starch?
Add a few drops of iodine solution. In the presence of starch it will go from browny orange to blue/black.
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How would you test a substance to see if it contains protein?
The biuret test will turn the solution from blue to pink/purple in the presence of protein.
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How would you test a substance to see if it contains lipase?
The Sudan III test will form two separate layers, with a red top layer, if lipids are present.
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How would you prepare a food sample?
Use a pestle and mortar to grind up a piece of food. Transfer to a beaker, add distilled water and stir. Filter this through a funnel to get rid of any solid pieces of food.
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Other cards in this set
Card 2
Front
How would you test a substance to see if it contains starch?
Back
Add a few drops of iodine solution. In the presence of starch it will go from browny orange to blue/black.
Card 3
Front
How would you test a substance to see if it contains protein?
Back
Card 4
Front
How would you test a substance to see if it contains lipase?
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