Weakness : Food tests Flashcards by Sebastian Mukherjee | Brainscape

Q

How do we test for Starch?

A

Add drops of iodine to a solution
Positive : Blue / black
Negative : Remains Brown / orange

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Q

How do we test for protein?

A

Add drops of a Biuret solution
Positive : Violet / purple
Negative : Remains blue

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Q

How do we test for Lipids?

A

Mix with ethanol

- Layer of white, cloudy emulsification of fat formed at the top of solution

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Q

How do we test for glucose?

A

Add Benedicts solution
Heat at 60-70 degrees in water bath for 5 mins
Take test tube out of water bath
Positive : Orange to brick red
Negative : Stays blue

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