P1 Req prac 4 (will come up) Flashcards
1
Q
How do you test for sugars
A
Add Benedicts solution to the food
Heat in a water bath
It will go green, yellow or brick red depending on how much sugar is present
2
Q
How do you test for starch
A
Add a few drops of iodine
It will change from orange to blue-black if starch is present
3
Q
How do you test for proteins
A
Add biuret solution to food
The solution will change from blue to pink or purple if protein is present
4
Q
How do you test for lipids
A
Add Ethanol solution to the food
If lipids are present, a cloudy white layer will form on top
5
Q
How to prepare solid food for food tests
A
Use a pestle and mortar to break the food up
Add to test tube with distilled water and mix it together using a glass mixing rod
Filter it use filter paper and a funnel, collecting a solution
