Find out a qualitative test for proteins, fats and oils, amino acids and test any fruit juice, saliva, sweat and urine for them.
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(a) Test for protein
Biuret’s test – If Biuret’s reagent is added to protein, then the colour of the reagent changes from light blue to purple.
(b) Test for fats and oils
Grease or solubility test
(c) Test for amino acid
Ninhydrin test – If Ninhydrin reagent is added to the solution, then the colourless solution changes to pink, blue, or purple, depending on the amino acid.
Biuret’s test – If Biuret’s reagent is added to protein, then the colour of the reagent changes from light blue to purple.
(b) Test for fats and oils
Grease or solubility test
(c) Test for amino acid
Ninhydrin test – If Ninhydrin reagent is added to the solution, then the colourless solution changes to pink, blue, or purple, depending on the amino acid.
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Answer:
biuret test,Grease or solubility test,Ninhydrin test
Explanation:
Test for Protein
Biuret test.Biuret reagents added to a sample to confirm the presence of protein colour changes light blue to purple.
Fats &Oils: Ethanol emulsion test is a food test which confirms the presence of fats.
Test for amino acids: Ninhydrin test: Ninhydrin reagents is added to the sample colourless solution changes to pink,blue or purple depends upon the presence of amino acids
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