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Food Tests

Food Tests

Copy this table into your book:

Chemical used for TestColour (if present)Colour (if absent)
Starch
Protein
Lipid
Glucose

Testing for Starch

Method: Add a few drops of iodine to the solution being tested Results: Iodine goes black if starch is present


Testing for Protein

Method: Add a few drops of

Testing for Lipid

Testing for Glucose


Chemical used for TestColour (if present)Colour (if absent)
StarchIodine SolutionBlack / PurpleYellow/Brown
ProteinBiuret SolutionLight PurpleBlue
LipidEthanolCloudy White PrecipitateNo Precipitate
GlucoseBenedicts SolutionOrange/RedStays Blue