Food Tests

9SCIE - Energy for Life

Finn LeSueur

2020

Food Tests

Copy this table into your book:

Chemical used for Test Colour (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 Test Colour (if present) Colour (if absent)
Starch Iodine Solution Black / Purple Yellow/Brown
Protein Biuret Solution Light Purple Blue
Lipid Ethanol Cloudy White Precipitate No Precipitate
Glucose Benedicts Solution Orange/Red Stays Blue