Food tests Flashcards
1
Q
Aim
A
Conduct tests for starch, sugars, proteins and lipids
2
Q
Test for starch
A
- Add a few drops of iodine solution to the food sample using a pipette
- If starch is present the solution turns from brown to blue black
3
Q
Test for sugar
A
Add an equal volume or excess Benedict solution to the food sample
Place in hot water bath
If sugar is present it will turn from blue to brick red
4
Q
Test for lipids
A
Add ethanol to food sample
If lipids are present a white emulsion is formed on the surface of the mixture
5
Q
Test for protein
A
Add a few drops of Biurets reagent to food sample
If protein is present the solution turns from blue to purple
6
Q
What is the test for lipids also known as
A
Emulsion test
