Instrumental Analysis Flashcards
1
Q
Mass Spectroscopy steps
A
Ionisation
Acceleration
Deflection
Detection
2
Q
Graph of mass spectrum
A
“Base peak” (highest peak)= most abundant ion
Highest m/z = Mr
3
Q
What ions are always used and why in mass spectrum?
A
Positive ions as electrons knocked off
4
Q
Cl35-Cl37 ratio
A
3:1
5
Q
Br79-Br81
A
50:50
6
Q
Infra-red spectroscopy
A
Peaks = absorption of IR radiation
7
Q
Nuclear Magnetic Resonance Spectroscopy is used in…
A
MRI scanners
8
Q
13C NMR used as…
A
13C present in all organic compounds
9
Q
1HNMR spectroscopy (proton NMR)
A
Relative peak areas give ratio of H atoms to each environment
