atomic absorption spectroscopy

Question 1

step one - sample

Answer 1

a solution of sample to be analysed is sprayed into a flame where it is converted into a atomic vapour/gaseous state at ground state

Question 2

step two - burner

Answer 2

light containing the wavelengths that are known to be absorbed by the atoms in sample is passed through the flame

Question 3

step three - hollow cathode lamp

Answer 3

cathode is made up of element being tested for and emits correct wavelength that is equal to the exact energy level the element will absorb
special lamp called hollow cathode lamp
lamp cathode is composed of element in interest

Question 4

step four - flame

Answer 4

atoms of element being analysed, present in the flame, absorb some of the radiation

Question 5

step five - monochromator

Answer 5

the light beam is then passed through a filter (monochromater) to select light of the chosen wavelength and its intensity is measured by an electronic detector

Question 6

step six - detector

Answer 6

known concentrations and absorbances are plotted on a graph and a calibration curve is plotted. now the ansorbance can be plotted and unknown concentration can be known