#emulsion test

[aqabiologyalevel]

The Emulsion Test

This is a test for lipids.

1. For every 2cm3 of a sample, add 5cm3 of ethanol.

2. Shake thoroughly for a minute or so in a test tube.

3. Add 5cm3 of water and shake gently.

4. If the mixture turns a cloudy white then a lipid is present, with the density of the colour being proportional to the concentration of lipid.