Biology Food tests
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16 Terms
1
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Glucose
Benedict’s test
2
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Starch
Iodine test
3
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Protein
Biuret’s test
4
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Lipids
Emulsion test
5
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Biuret’s test (method)
Add sodium hydroxide + copper sulfate
6
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Emulsion test (method)
Add ethanol + water
7
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Benedict’s test (method)
Add Benedict’s solution, then warm in a hot water bath
8
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Iodine test (method)
Add iodine
9
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Positive result for Biuret’s test
Purple
10
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Positive result for Benedict’s test
High concentration: Brick red
Medium concentration: Yellow/ orange
Low concentration: Green
11
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Positive result for Iodine test
Blue-black
12
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Positive result for Emulsion test
Cloudy white
13
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Negative result for Biuret’s test
Blue
14
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Negative result for Benedict’s test
Blue
15
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Negative result for Emulsion test
Colourless
16
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Negative result for Iodine test
Brown