food tests Flashcards
1
Q
what solution do you use when testing for protein
A
biuret solution
2
Q
what happens if protein is present
A
turns purple/lilac
3
Q
what solution do you use when testing for carbohydrates (starch)
A
iodine
4
Q
what happens if starch is present
A
turns blue/black
5
Q
what solution do you use when testing for lipids (fats)
A
ethanol or sudan III
6
Q
what happens if lipids are present
A
white / cloudy layer will form
7
Q
what solution do you use when testing for glucose
A
benidicks solution
8
Q
what does it mean if the solution turns green when testing for glucose
A
small amount of glucose present
9
Q
what does it mean if the solution turns orange when testing for glucose
A
some glucose present
