Food Tests

Question 1

Glucose

Answer 1

Benedict’s test
Prepare a food sample and transfer 5cm^3 to a test tube
Prepare a water bath so it’s set to 75 degrees Celsius
Add 10 drops of Benedict’s solution using a pipette
Place tube in water bath for 5 minutes
Blue - brick red

Question 2

Starch

Answer 2

Iodine solution
Make a food sample and transfer 5cm^3 of sample to a test tube
Add a few drops of iodine solution and shake the tube to mix the contents
Browny/orange - black/blue

Question 3

Proteins

Answer 3

Biuret test
Sample of food, transfer 2cm^3 to a test tube
Add 2cm^3 of biuret solution to the sample and mix
Blue - pink/purple