UW CHEMISTRY NMR
Announcments & Equipment Logs
Hardware
ALERT ! NEO500 – SYSTEM WILL BE DOWN BRIEFLY FROM 1.30 PM FOR HARDWARE WORK
Hello Users The remedial circuit boards that should resolve the intermittent Shim failure, will be installed and tested in the system starting from 2 PM and a bit of preparation is needed before that. Please do NOT queue any samples after 1 PM today. Any halted runs between 1 PM and the instrument down time […]
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NEO500 : IMPORTANT CLARIFICATION ABOUT TUBE LENGTHS
Dear Users While you were trained on the new NEO500 system, you were told that it is OK to use the J-Young type tubes even with this fully automated system. This is definitely true, but certainly there is a caveat to that statement. Please look at the picture below. The ‘dotted line’ is roughly the […]
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ALERT ! NEO500 – SHIM QUALITY ISSUES
Dear Users Many of you might have noticed that the lineshape and resolution you got for many of your samples in the past several days are not what you expected, that too from a mint condition instrument such as NEO500. We are aware of this and have been applying remedies to resolve this transparently. I […]
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UPDATE ON AV300 : SYSTEM HAS UPGRADED VT CONTROL NOW !
Dear Users Thanks to a low temperature chiller that we repurposed from the recently decommissioned AV500 console, the AV300 system now has much better temperature stability and also the capability to lower your sample temperature close to 0 deg. C, if you wish to. Temperature stability is quite important, when it comes to Lock and […]
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UPDATE ! GG500 – UPGRADE TO NEW PROBE POSTPONED
Dear Users The Smart Probe Install is delayed due to some technical issue. We need the manufacturer to provide us a configuration workaround before the new probe can be used with GG500. I will keep you posted as to further developments. Currently, the system has the TXO-19F{1H,13C} probe installed in the magnet. NMR Facility Manager […]
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UPDATE ! GG500 – VT SYSTEM UP
Dear Users It turned out to be a simple problem that caused the VT system not controlling the temperature. The instrument is working normally now. Please go ahead and reserve time for immediate use. Please remember that an important hardware upgrade is happening tomorrow, and the instrument won’t be ready until Wednesday. NMR Facility […]
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ALERT ! GG500 – VT MALFUNCTION
The Chiller for this unit is not running as expected, leading to no Temperature control. The sudden deterioration of shim performance some have reported is most probably tied to this. I will post an update once the issue is resolved. The instrument cannot produce useable data because of this and so, it is blocked off […]
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NEWS ! NEW 500 NMR SYSTEM INSTALLATION SCHEDULED FOR NEXT WEEK
Dear Users This is in continuation of the announcement I made sometime ago about the imminent arrival of a brand new 500 MHz NMR spectrometer to our facility. Starting the afternoon of tomorrow, Friday the 3rd, a series of events will take place : The AV500 CONSOLE will be shut down and retired permanently (the […]
Posted in Hardware, NMR Facility Usage, Spectrometer | No Comments »
UPDATE ! AV301 : TOPSHIM TEST LOOKS GOOD
Dear Users I managed to get hold of six sample tubes of same compound in CDCl3, (thanks to the kind help from Chem Lab Techs, David and Lance) to test the Topshim consistency. In my experience, the shimming is consistent and reliable. Below is a snapshot of the aliphatic region from all the six samples […]
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UPDATE ! AV301 : TOPSHIM SHOULD WORK WITH WEAK SOLVENTS NOW
Dear Users Thanks to a generous donation of a crucial component from a fellow public University like ours, I could revive the ability for this instrument to do meaningful Topshim based shimming on weak solvents like CDCl3. The results based on the tests I ran on a few samples at my disposal and a few […]
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