With the aid of a clearly labelled schematic diagram, illustrate the main layout of a flame...

With the aid of a clearly labelled schematic diagram, illustrate the main layout of a flame atomic absorption spectrometer with continuum source background correction. Describe briefly the purpose of each component.

Your diagram should include reference to the following components:

The hollow cathode lamp The flame and burner

The deuterium lamp The monochromator

The modulator or chopper The detector

Solutions

Expert Solution

Flame atomic absorption spectrometry is a quantitative analytical method based on

measuring the light absorption of free, ground state atoms.

The relationship between the decrease of light intensity at the wavelenght of the examined metal and the concentration of free atoms in a unit of volume is obtained by Lambert-Beer law

A= log(I_o/I) = a.c.l

where A=absorbance, I_o= initial light intensity before absorption,I = Light intensity after absorption

a = absorption coefficient (constant depending on material properties)

c = number of free ground state atoms in the atomizing unit (flame)

l = lenght of way passing the light in the atomizing unit

queen_honey_blossom answered 1 hour ago

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