Question

5) Describe the signifinace of the temperature for atomic spectroscopy, including the effect on:

a) the excited state population

b) the absorption and emission signal

Answer 1

a) effect on the excited state population:The absorbtion and emission signal is proportional to the population of excited levels ,so a high temperature is required(around 5000 kelvin)

b) effect on the absorption and emission signal:The atomizer is only needed to atomize the sample,but electronic excitation is done by an external line light source.Consequently,a too high temperature of the atomizer is inadvantageous because ionization of many of the sample atom like alkali would also occur.

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