Various users have requested a change in capabilities on the DPX 400 MHz (NMR-Paprika) in Evans 0083. The probe which has been installed since 2011 was an inverse probe (BBI) – optimized for 1H detection and 2D experiments. However, this probe was not useful for acquiring quality 13C spectra or other nuclei.
The probe installed today is a QNP probe (quartenary nuclei probe) capable of acquiring NMR spectra from four nuclei: 1H, 13C, 31P, 19F.
What you need to know:
- Shim file: To load a shim file prior to shimming the probe, type QNP.shim
- Default tuning: The probe is currently tuned to 1H and 13C. The 1H tune is not as sensitive to solvent changes, such that tuning the proton channel is not necessary for standard 1H experiments. If you’d like to learn to tune the probe (wobb) for quantitative 1H or 2D experiments, please let me know. The procedure is a bit different than the BBI probe.
- 31P and 19F: If you need to acquire these nuclei please contact me for training. The procedure for tuning is very different from the BBI probe.
Let me know if you run into any problems!!
