Spectroscopy

Question 0

What is done in the AES

Answer 0

Sample is converted into gas then excited using a flame or electricity
Which excites the atoms which then release energy in the form of light

Question 1

What is AES

Answer 1

Atomic Emission Spectroscopy
Used for chemical analysis ( identification and analysis of elements within a sample) quantativelh as it measures the light produced
Usually fit invisible region 400-700nm
Sme tikes energy difference is greater and falls into UV region 200-400nm

Question 2

What is the AAS

Answer 2

Technique to determine the concentration of a particular metal element in a sample

Question 3

What is done to the electrons in the AAS

Answer 3

Promoted to higher energy levels by absorbing energy

Usually within 200-700nm

Question 4

What are the uses of the AES and the AAS

Answer 4

Give info as to how much of a species is in a sample

In AAS calibration graph prepared from known concs

Question 5

What is proportional to the concentration of the element

Answer 5

Intensity of radiation emitted or absorbed