Biochemical Food tests ₊˚⊹ ᰔ.

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5 Terms

1
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Test for proteins

Biuret Test: light blue → purple

Gently shake protein solution+ biuret reagent

2
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Test for reducing sugars - glucose

Benedict's Test - light blue → brick red

Heat in water bath

3
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Test for non reducing sugars - sucrose

If negative result was found initially with Benedict's - add hydrochloric acid ( will hydrolyse any glycosidic bonds ) Ada hydrogen carbonate powder to neutralise had Benedict's reagent - blue → red

4
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Test for Starch

Iodine solution- orange/brown → blue/black

5
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Test for lipids

Ethanol- white cloudy emulsion

Lipids are hydrophobic only dissolve in organic solvents - mixt + add water -