Atomic absorption spectroscopy

Question 1

what does it do?

Answer 1

it uses light absorption to measure the amount of an element present in a sample
- works on the principle that gaseous atoms can only aborb lights of specific wavelengths, and that the amount absorbed is proportional to its concentration

Question 2

what is the first step?

Answer 2

1. Element is analysed using a qualitative method
   helps to focus on just one element

Question 3

what’s the second step?

Answer 3

2. Light of the correct wavelength is generated
   using a hollow cathode lamp made of the element being detected so that it generates the correct wavelength

Question 4

what’s the third step?

Answer 4

3. Sample is vaporised
   done by spraying liquid form into an energy source turning it into individual atoms

Question 5

what’s the fourth step?

Answer 5

4. The light passes through the sample
   only the element being tested will absorb it
   greater concentration = more light absorbed

Question 6

what’s the fifth step?

Answer 6

5. Light that passes through is focused through a slit and enters a monochromator
   separates absorbed wavelengths from others

Question 7

what’s the final step

Answer 7

6. The specific selected wavelength goes through a detector
   measures intensity of light
   a calibration curve can be used to determine concentration
   higher amount of the element = more absorbed