Chromatography Flashcards
1
Q
Name 3 types of chromatography
A
Thin layer
Column
Gas
2
Q
How does TLC work
A
plate coated in solid such as silica and solvent moves up the plate
3
Q
How does CC work
A
column is packed with a solid
solvent moves down the column
4
Q
How does GC work
A
column packed with solid/solid coated with liquid
gas passed through the column at high temperature
5
Q
How does separation in chromatography work
A
Depends on the balance between solubility of the moving phase and retention by the stationary phase
6
Q
What can be used to analyse components separated by GC
A
mass spectrometry
7
Q
Explain why it may be necessary to use more than one solvent in TLC
A
some components may not be soluble in both solvents
some components may hve the same rf value in one of the solvents
