Atomic Absorption Spectroscopy requires the conversion of the sample to gaseous atoms, which absorb radiation. In AAS the sample is most commonly introduced as a solution. The solution is drawn in through a small tube and taken to the nebulizer where the solution is broken up into a fine mist (this is similar to an aerosol can). The fine mist is carried to the atomizer, such as a flame, by a carrier gas. When the mist reaches the flame, the intense heat breaks up the sample into its individual atoms. This final process is called atomization.