Food tests Flashcards
1
Q
What test is used for sugars and what colour does it change to?
A
Benedict’s test.
Changes from blue to green, yellow or red.
2
Q
What is the test for starch and what colour does it change to?
A
Iodine solution.
Changes from browny-orange to blue-black.
3
Q
What is the test for proteins and what colour does it change to?
A
Biuret test.
Changes from blue to purple.
4
Q
What is the test for lipids and what colour does it change to?
A
Sudan III or ethanol.
Top layer turns bright red.
