Food Tests Flashcards
0
Q
If starch is present the iodine will turn?
A
Blue/black
1
Q
To test for starch you use?
A
Iodine
2
Q
If starch isn’t present the iodine will turn?
A
Brown
3
Q
What do you use to test for glucose?
A
Benedictus solution (heated strongly)
4
Q
When glucose is present what is the colours it goes through?
A
Green➡️ yellow ➡️ orange ➡️ brick red
5
Q
What do we use to test for fat?
A
Rub onto paper
6
Q
If fat is present what happens?
A
There is a translucent mark left after rubbing
7
Q
What do you use to test for protein?
A
Small amount of DILUTE sodium hydroxide solution and equal amounts of copper sulfate
8
Q
If protein is present what shows up?
After adding sodium hydroxide and copper sulfate
A
Purple colour
