Despite my best attempts to convince users otherwise, many still want to run 1D 13C spectra. Because of the poor sensitivity of 13C this is a time consuming, and thus costly, experiment. Sensitivity is mainly determined by the strength of the magnet and the type of probe being used. Since we are currently considering acquiring new equipment, I was curious to see how different probes and fields would impact the time taken to record 13C spectra and so collected sensitivity specs for a variety of probes.
