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Flashcards in Food Test Biology Deck (4)
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1

Starch

Test: Iodine.

Clout at start: Amber

Colour at end of positive test: Blue/Black

2

Reducing Sugar

Test: Benedict’s (plus heat)

Colour at start: Blue

Colour at end: Brick-red (a little sugar-green)

3

Lipids

Test: Emulsion (ethanol)

Colour at start: Clear

Colour at end: Milky emulsion (droplets suspended)

4

Protein

Test: Biuret test (potassium hydroxide copper sulphate)

Colour at start: No change

Colour at end: Purple