UW CHEMISTRY NMR

J-Young tubes tend to shift the center of mass once you place it in the spinner, compared to regular tubes. The tube tends to wobble as it rides the air cushion,  when it descends into the magnet and sometimes the sample seating can become problematic. In AV301 this problem is a bit exacerbated currently, since […]

Users are requested to note that the Chemistry IT team will be taking the  NMR Reservation system computer offline for an urgent maintenance issue.  The outage might last as long as 2 hours from now.   An update will be posted once it is back on line. NMR Facility Manager

The intermittent locking issue should be gone by now as I have reset the Lock system.  If you still see a problem, feel free to post the observations in the instrument log online.  Remember, if the shims are way off or if the Lock phase is not correct, you will have problem locking on your […]

The Lock resonance was set to a wrong Field value leading to no observable signal even though all the indications would have made you feel that there is no hardware problem anywhere.  The problem is rectified and you shouldn’t have any issues with acquisition.  If anyone is curious to learn more on the problem, please […]

The ATMA  BBI probe that is capable of computer controlled tuning/matching will take the place of the current TXD-19F probe. The probe should be ready for regular use by 4.00 pm, Tuesday the 7th of September i.e. tomorrow.  All the TOPSPIN user interfaces will have the Auto Wobb button that will help you automatically tune […]

The topspin environment is functional with the spectrometer, running on the new computer.  Compilation of Topspin automation scripts is not yet up and running and this will be addressed in the coming days.  But the spectrometer is usable in a normal fashion. Please keep the facility staff updated if you notice anything worthwhile.  If your […]

After creating a dataset of choice, users can simply enter the macro fluorine  to invoke the default 19F parameter set that includes  1H decoupling. Please remember to adjust O1P to your required offset to observe 19F signal.    Included below is a sample 19F spectrum.  Blue spectrum is with 1H decoupling and the Red spectrum is without 1H […]

System is tested to work fine.  Here is a solvent suppression snapshot done on the dummy sample i.e. 1:1 H2O+D2O.

It appears the storms this morning caused some fluctuations in the electrical and gas lines to the NMR spectometers leading to issues with the consoles, as is being reported to the facility by users using the error logbooks currently. For the time being, please consider the NMR spectrometers offline until an NMR Facility Manager can […]