NATURAL PIGMENTS: Lily’s Red

Mireia Mestre Marc RevertéDèlia Prades Maria Gimeno 4t ESO

Procedure

• First, our teacher bought some lilies, the ones that we used for making some red colorant.

• We separated the petals from the stem, so we could put them on a beaker with 300 ml of water, and some petals with alcohol because the process is faster.

• To make the procedure easier we cut the petals with a spoon.

• We left the beaker at the laboratory for two days in order to obtain the colour of the lily in the water.

Result• After the two days, the water and the alcohol already had the

colour of the lily so we filtered it and obtained the liquid without the petals.

• The chemical compound that has the red of the lily is named flavonoid and its structure is:

Spectrum• The spectrum of the colorant we obtained has this form

because the only colour that’s not absorbed is the red, that’s why it is red, and the other colours are absorbed like the blue, green, etc.