Biochemical Tests: Lipids

Question 1

What is the test for lipids called

Answer 1

emulsion test

Question 1

This test is qualitative or quantitative

Answer 1

qualitative

it does not give a quantitative value as to how much lipid may be present in a sample

Question 2

Lipids are nonpolar molecules that do not dissolve in water but will dissolve in

Answer 2

organic solvents such as ethanol

Question 3

1, Add ethanol to the sample to be tested, then

Answer 3

, shake to mix and then add the mixture to a test tube of water

Question 4

If lipids are present, a

Answer 4

milky emulsion will form (the solution appears ‘cloudy’); the more lipid present, the more obvious the milky colour of the solution

If no lipid is present, the solution remains clear

Question 5

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Question 6

SAFETY and Extra INfo

Answer 6

If lipids / food is solid ground up

Use a bung to close ethanol when shaking beaker so it doesn’t spill as vapour can cause irritation