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MR Spectroscopy
•
Electron shielding alters B
0
•
Chemical shift identifies specific
molecules
•
PPM scale independent of field
strength
REF
REF
ppm
ν
ν
ν
−
× =
6
10
(
)
σ
−×=′
1
B B
σ
varies 10
-2
to 10
-6
shielding constant