Higher field spreads out the signal better, makes coupling patterns simpler,
https://1686990.com/view/zsh/index.html?lottype=sgAirshipseparates different signals better. Again, 600>500 > 400>300 MHz.
Linewidths in Hz are similar whatever the field, so the linewidths in ppm are smaller at the higher field strengths, unless a frequency-dependent line broadening mechanism interferes.
Proton-detected experiments
Availability
H1 experiments are available on all instruments.
1D Proton experiment
Default Parameters
~2 second acquisition time
~1.5 second relaxation delay
Spectral width -2ppm to 18ppm
16 scans
Total time: 1 minute
https://1686990.com/view/jisusaiche/pk10kai.html
Variations on the 1D experiment include
1D NOE or selective NOE (difference or gradient)
1D COSY or Selective COSY (gradient)
T1 determination
https://1686990.com/view/uklotto8/klsf_index.html
Recommended Concentration