C2.1.6 Chromatography

Question 1

What two phases does chromatography rely on?

Answer 1

A stationary phase that doesn’t move
A mobile phase that does move

Question 2

What are the stationary and mobile phase in paper chromatography?

Answer 2

The stationary phase is absorbent paper
The mobile phase is a solvent in the liquid state, such as water or propanone

Question 3

What does thin layer chromatography do differently

Answer 3

Works the same way but stationary phase is a thin layer of silica or alumina powder spread over a plate of glass or plastic

Question 4

What is the chromatogram

Answer 4

The pattern of coloured spots produced

Question 5

What is the stationary phase in GAS chromatography

Answer 5

The stationary phase is silica or alumina powder packed into a metal column
The mobile

Question 6

What is the mobile phase in GAS chromatography

Answer 6

An unrescfuve carrier gas like nitrogen, that doesn’t react with the sample