Distinguish between Flame Photometry and Atomic Absorption Spectrometer (AAS)Optical MethodsAnalytical Chemistry

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#	Flame Photometry	Atomic Absorption Spectrometer
1	Atoms absorb the thermal energy and are excited, these excited atoms return to ground state with the emission of radiations.	The atoms which are present unexcited in the ground state absorb the radiations.
2	Intensity of emitted radiations is measured.	Intensity of absorbed radiations is measured.
3	Intensity of emission depends on no. of atoms excited.	Intensity of absorption depend on the no. of atoms unexcited present in the ground state.
4	It depends on the temp. of the flame.	It is Independent of the flame temp.
5	No separate source of radiations is needed.	The separate source of radiations is required.
6	Interference of spectral lines takes place.	No interference of spectral lines take place.
7	Beer-Lambert’s Law is not applicable.	Beer-Lambert’s Law is strictly applicable.
8	It is less expensive.	It is more expensive.

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