Food Tests Flashcards
1
Q
How do you create a food sample?
A
1) Get a peace of the food being tested and break it up using a pestle and mortar.
2) Transfer the food (now in very small molecules) to a beaker and add some distilled water.
3) Stir the food molecules and the distilled water together with a glass rod too disolve some of the food.
4) Filter the solution using a funnel lined with filter paper to get rid of the solid bits of food.
2
Q
What does the Benedict’s Test test for?
A
Sugars
3
Q
What does the Iodine Solution Test test for?
A
Starch
4
Q
What does the Biuret Test test for?
A
Proteins
5
Q
What does the ethanol test for?
A
Lipids
6
Q
How do you test for Sugars?
A
- Add benedicts solution to the food sample
- Sample will turn from blue to green, yellow or brick red (depending on the concentration of sugar)
7
Q
How do you test for Starch?
A
- Add iodine solution to the food sample
- Food sample will change from brown/organge to blue/black
8
Q
How do you test for proteins?
A
- Add biuret solution to the food sample
- Food sample will turn from blue to purple
9
Q
How do you test for lipids?
A
- Add ethanol to the food sample
- Food sample will turn white
