Please prepare your samples in the designated area or under a hood, and not on top of the magnet. The chemical shifts (d) of solvent signals observed for 1 H NMR and 13 C NMR spectra are listed in the ...

An NMR signal must be substantially bigger than the noise level to investigate. A minimum requisite for an S/N level might be 3:1. In standard 1 H NMR experiments of small organic molecules.