Food tests

Question 1

Test for sugars

Answer 1

Benedict’s solution is used to test for sugars. First the solution is added into the sample, it is then placed in a water bath set to 75 degree. Leave it in there for 5 minutes. It will turn from blue to green, yellow or brick-red

Question 2

Test for starch

Answer 2

Add iodine solution. It will turn from browny-orange to blue-black

Question 3

Test for proteins

Answer 3

The test for protein uses the Biuret solution. It will turn from blue to purple.

Question 4

Test for lipids

Answer 4

Add Sudan III solution. It will separate the sample into two layers: the bottom is clear and the top layer will be bright red.