Practice 5: Determination of lipids

DETERMINATION OF LIPIDS

We'll do some experiments:



- Insolubility in water

1.- We take some olives and we cut the pulp into very little pieces.

2.- We throw the pulps in a test tube and we add more or less 5 cm. of water (even level the test tube).

3.- We wave the tube to mix them and we let them rest.

4.- After resting, we can see how some drops of a yellow color have just formed due to the slags are insolubly in water and for his minor density they place on the water.



- Solubility in dissolvents

1.- We catch the pulp of an olive and we make some incisions of her.

2.- A time cutted, we through her in a test tube and we add 2 cm3 of eater.

3.- We let rest the mixture (eater with dissolver slags) and we through in a sump of porcelain or glass.

4.- We evaporate the liquid in fire and we'll obtain some drops of oil.