WM: Mass Spec Flashcards
1
Q
What is the last line caused by and what’s it called?
A
The M+1 peak, caused by the presence of the C-13 isotope
2
Q
What is the molecular mass for the CH3+ fragment?
A
15
3
Q
What is the molecular mass of the C2H5+ fragment?
A
29
4
Q
What is the molecular mass of the C3H7+ fragment?
A
43
5
Q
What is the molecular mass for the OH+ fragment?
A
17
6
Q
What is the molecular mass of the C6H5+ (phenyl ion) fragment?
A
77
7
Q
How do you find the MR of a compound?
A
Look the the tallest line at the end
8
Q
How do you find “lost fragments?”
A
It’s the difference between peaks
