UW CHEMISTRY NMR
Announcments & Equipment Logs
UPDATE ! GG500 : iPROBE IS PRIMED AND READY TO GO
Dear Users Thank you for your kind patience. The probe shims up great and for those of you who are curious, here is a snapshot of the 1D proton spectrum of the so-called Lineshape standard, i.e. 1% CHCl3 in Acetone-d6. The wiggly noise flanking the central singlet of CHCl3 are mostly due to floor vibrations […]
Posted in Probeheads | No Comments
ALERT ! GG500 – iPROBE NOT READY YET
Dear Users Fresh from the expensive repair, the iProbe is not delivering what it promised. Although you might see Topshim seem to complete it’s job, digging deeper, it is clear that the shimming is not at an acceptable level. Since we have a narrow window of warranty for such repairs, it is imperative that we […]
Posted in Hardware, Probeheads, Spectrometer, Usage | No Comments
UPDATE ! NMR ACCOUNTING SYSTEM TRANSITION – GROWTH PAINS
Dear Users Those of you who attempted to book NMR time TODAY as usual would have noticed the eerie quietness of the calendar page for any of the instruments. Even the maintenance related reservations such as cryogen fills will have disappeared. For some Netid-s the reservation system allows you to block time and for most […]
Posted in NMR Facility Usage | No Comments
UPDATE ! GG500 : iPROBE IS IN THE MAGNET – WITH A CAVEAT
Dear Users Most of the vitals are looking good with the probe, with one caveat. With your samples, the Topshim procedure may take a while to converge. Since the issue needs careful analysis, instead of blocking the instrument, it is releasd for routine use immediately. You might see the calendar blocked intermittently in the coming […]
Posted in Uncategorized | No Comments
ALERT ! GG500 – iPROBE IS BACK – PROBE CHANGE TODAY
Dear Users We usually provide a day or so, when a probe swap is planned in a given instrument. This is usually the practice when the swap is done for benign reasons. An example will be moving from BB (BroadBand) capability to a specialized capability such as only-19F observation. This usually gives the BB users […]
Posted in Hardware, NMR Facility Usage, Probeheads, Spectrometer, Uncategorized | No Comments
UPDATE ! GG500 – ALL GOOD
Dear Users Topshim as well as Gradient assisted experiments are running correctly now. Tip: For fully dueterated lock solvents, you MUST touch up the X and Y shims by hand to get the best resolution ! NMR Facility Manager 6/28/23
Posted in Hardware, Spectrometer | No Comments
ALERT ! GG500 – GRADIENT MALFUNCTION
Dear Users We are aware of the issue with gradients that leads to a failure of Topshim (and gradient assisted experiments as well). We will take a look at the possible causes and provide an update as soon as we can. Stay tuned NMR Facility Manager 6/28/2023
Posted in Hardware, Spectrometer | No Comments
UPDATE ! NEO500 – SYSTEM UP – USER ERROR CAUSED INTERRUPTION
Dear Users I will once again draw your attention to the following post that was broadcast about a month ago. This pertains to the proper way a sample is handled with NEO500 and the SampleCase automated sample changer. Click here for that post. To jog your memory, here is the accompanying picture Over the […]
Posted in Hardware, Spectrometer, Uncategorized, Usage | No Comments
ALERT ! NEW IMPLEMENTATION : USED SAMPLE POLICY
Dear Users The Picture would have jogged your memory about our discussion on how to handle unused sample tubes in NEO500 and avoid clogging up the queue system. In reality, the unused/abandoned sample tube problem has been a prevalent one even with the other systems that don’t sport an automation robot (yet !). After a […]
Posted in NMR Facility Usage | No Comments
UPDATE – NEO500 : AUTOMATION QUEUE STARTED AGAIN
Dear Users Nothing more to add on the technical side of the instrument. But I do have something to add as to the handling of sample and the system. There is a ‘method to the madness’ and a ‘rationale behind a pesky insistence’, when me or Adrienne shout from the rooftop. (As I was writing […]
Posted in Hardware, Spectrometer, Usage | No Comments