Chemical shift and spin-spin splitting:

Problem:

Explain how lines due to chemical shift may be differentiated from those due to spin-spin splitting.

Answer:

The lines due to chemical shift can be differentiated from those due to spin-spin splitting by taking the spectrum at a higher field. Though the chemical shift in terms of δ units does not change but in terms of shift from the internal standard in units of Hz would increase. On the other hand the coupling constant being independent of the applied field its separation would not get affected by changes in the field strength.