Food Tests Flashcards by Tomasz Jakubowski

Q

What solution do you add to test for starch?

A

Iodine solution (brick-red)

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Q

What is the result for the starch?

A

It goes from Brick red colour to Blue/Black colour

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Q

What solution do you add to test for sugar?

A

Benedict’s solution (blue)

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Q

What is the next step for testing sugar?

A

Heat gently at about 70°C (approx 10 mins)

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Q

What is the result for testing sugar?

A

From a Blue colour to an Orange colour

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Q

What solution do you add to test for Proteins?

A

Biuret solution (blue)

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Q

What is the next step when you test for proteins?

A

Shake the test tube gently

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Q

What is the result when you test the proteins?

A

It goes from a Blue colour to a Violet colour

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Q

What solution do you add to test for Fats/Lipids?

A

A Few drops of water and a Few drops of ethanol

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Q

What is the result for testing Fats/Lipids?

A

A White precipitate (emulsion) layer forms

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