AAS and FIA (1 Viewer)

[Chris!]

Does anyone know where to get or have any good information on Atomic Absorption Spectroscopy and (Flow Injection Analyser or Ion cromatograph) as i have to do an assignement on them, thanks. Chris

 

[wahashtini]

also, about AAS, if anyone knows how to explain the process in simple terms plz do, cause im not quite getting how it achieves its purpose

 

[Xayma]

Each atom emits light of certain wavelengths when exicted, this acts like an atomic fingerprint since it is unique to an atom.

So a lamp is set up containing these excited atoms (ie they emit certain wavelengths), now the atoms also absorb the wavelengths they emit, so depending on how much of the light from the lamp is absorbed dertermines the concentration.

Standard Solutions are used to find out the absorbance so that a calibration curve can be drawn up and the concentration of the unknown found.