Atomic absorption spectrometer with graphite technique
Skraćeni naziv instrumenta
AAS_GF
Inventarni broj
1799
Opći opis
Atomic Absorption Spectrometry (AAS) is based
on the absorption of radiation passing through
the atomic vapor of the sample. As a source of
radiation, hollow cathode lamp is used, while
atomization of samples (obtaining atomic
vapor) is carried out in a graphite furnace.
When electromagnetic radiation, characteristic
for transiting electrons in the outer orbitals of
atom of an element, passes through the atomic
vapor of that element, some of the radiation of
certain frequencies will be weakened. Absorbed
radiation excites electrons from the ground
state to different higher energy states. The
degree of absorption is a quantitative measure
of the concentration.
