Emulsion Test

Question 1

What are the steps for the emulsion test

Answer 1

Place two spatulas of the food sample into a test tube or 1 cm3 if the sample is liquid.
Add 2 cm3 of ethanol to the tube. Cover the end of the tube and shake the tube vigorously.
Allow the contents to settle.
Pour the liquid from the top of the mixture into a test tube half-filled with water.
Record the level of the food and whether the water is cloudy or clear.

Question 2

What does the emulsion test test for?

Answer 2

Lipids

Question 3

What appearance does the emulsion test go for positive?

Answer 3

Cloudy (White emulsion)

Question 4

What appearance does the emulsion test go for neagtive?

Answer 4

Remains clear

Question 5

The first step in the test for a lipid is to add ethanol. What does this do?

Answer 5

Dissolve the lipid. Then water is added to emulsify the solution