Atomic Absorption Spectrometer Thermo Scientific, England.

It is an analytical technique used to determine how much of certain elements there are in a sample. It uses the principle that atoms (and ions) can absorb light at a specific, unique wavelength. When this specific wavelength of light is provided, the energy (light) is absorbed by the atom. Electrons in the atom move from the ground state to an excited state. The amount of light absorbed is measured, and the concentration of the element in the sample can be calculated.