food tests Flashcards
1
Q
what does Biuret reagent test for and what colour does it go when positive?
A
proteins and turns pink or purple
2
Q
what does iodine test for and what colour does it go when positive?
A
starch and turns blue-black
3
Q
what does Benedict’s solution test for and what colour does it go when positive?
A
sugar and turns orange or red
4
Q
what does Sudan III or ethanol test for and what colour does it go when positive?
A
lipids and becomes a red layer or turns cloudy
