Mass spectometry Flashcards
1
Q
How is signal intensity related to relative abundance?
A
Higher relative abundance = higher signal intensity
2
Q
What is the nitrogen rule?
A
If M+ is even, then the compound must contain an even number of nitrogen atoms, or no nitrogen atoms
3
Q
What can you derive from the M+ + 1 peak?
A
The number of C atoms = relative abundance / 1.1
4
Q
What can you derive from the M+ + 2 peak?
A
The presence / absence of:
S if its 4.4%
Cl if its 33%
Br if its 98%
5
Q
How do you calculate the degree of unsaturation?
A
degree of unstauration = (2C + 2 + N - H - X)/2
6
Q
What is ionisation potential?
A
THe amount of energy (in eV) required to remove an electron from the molecule
7
Q
A
