Mass Spectroscopy Flashcards
1
Q
The energy of the electrons is
A
1600 kcal (70 eV)
2
Q
The tallest peak in the mass spectrum is called the
A
base peak
3
Q
Structure of MS
A
Inlet system
ion source
mass analyzer
detector
signal processor
Readout
4
Q
The two main forms of MS are
A
electrospray
MALDI
5
Q
Bromine (m+2) peak will be
A
50/50
6
Q
Nitrogen will have
A
an odd number for MW (if odd # N)
an even number for MW (if even # N)
7
Q
If the (m+2) peak is 1/3 as large as the M+ peak then you have
A
Cl
8
Q
Loss of methyl equals
A
M+ - 15
9
Q
Loss of ethyl
A
M+ - 29
10
Q
Loss of propyl
A
M+ - 43
11
Q
Loss of butyl
A
M+ - 57
12
Q
Aromatics have a peak at
A
77
13
Q
What is Raman spectroscopy?
A
small fraction of radiation scattered by certain molecules
14
Q
What is Stokes?
A
emission energy is less than excitation energy
15
Q
What is Anti-Stokes?
A
emission energy is more than excitation energy
