What is the external magnetic field #(B_0)# in NMR processes?
1 Answer
When you insert an NMR tube containing your sample into the NMR machine, you are placing it between the poles of a big magnet. The external magnetic field
The field strengths of most instruments range from 1.41 T to 11.75 T.
They are usually reported in terms of the corresponding resonance frequencies of protons.
The relationship is
So, a 100.00 MHz instrument has
Other nuclei such as
If you have a 2.3487 T (100 MHz) instrument, you will have to use a frequency of 25.14 MHz for
Here are the corresponding frequencies for some other nuclei.
