Concrete (perfumery)

Concrete, in perfumery, is a waxy mass obtained by solvent extraction of fresh plant material.

If the boiling point is too high, compounds that are readily deactivated by heat might be destroyed, leading to a loss of certain fragrance ingredients during evaporation.

[4] The resulting residue after evaporation consists mostly of heavier nonvolatile substances, which give concrete its "waxy" properties.

Putting the plant materials under high pressure before treating it with solvents has been found to greatly increase the yield of the concrete.

Previous analyses that used gas chromatography were heavily affected by the different components of the complex mixture of concrete samples.