UW CHEMISTRY NMR
Announcments & Equipment Logs
Spectrometer
UPDATE ! AV301 : SAMPLE LANDING AND SPINNING ISSUES RESOLVED !
Hello Users ! We have done a ‘deep cleaning’ of the sample handling system yesterday and the results speak for themselves. The sample lands properly and it is detected correctly by the system. The Sample Spinning settles to its target rate pretty quickly now. We also have shimmed up the system and so it should […]
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UPDATE ! GG500 – IS BACK ONLINE FOR REGULAR USE…
Dear Users GG500 is now ready for routine use with the TBI triple resonance probe in place, calibrated and optimzied. I am also glad to add that the VT control is completely restored now so that you can run temperature variation experiments. The nominal range is about -10 C to 70C but I will give […]
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UPDATE : GG500 – DELAYED TILL TOMORROW..
Dear Users Unfortunately the instrument is not yet ready for regular use but we hope that it should be back in regular use by noon of tomorrow, Tuesday the 12th. Sorry for this delay. NMR Facility Manager 10/11/2021
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ALERT ! GG500 – IMMINENT PROBE CHANGE- BBO to TBI
Hello Users We will be replacing the current double resonance BBO Probehead with the triple resonance TBI Probehead, on Monday, the 11th. The instrument will be busy for this purpose, roughly for 3 hours beginning 10 AM on that day. This is a quick note. I will follow this with another later, that will provide […]
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FACILITY UPDATE ! ALL SYSTEMS BACK TO NORMAL – 17 Sep 2021
NMR machines are ready for use. Vitals have been checked and they are OK. Feel free to communicate any abnormal behavior, just in case. The FTP server is up and running also. NMR Facility Manager 9/17/2021
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AN APPEAL : HANDLING BROKEN SAMPLES..
Hello NMR users In the unavoidable situation where a sample tube breaks on the bench (far better a situaion than it breaking inside the magnet !), please dispose off the broken tube, shards, etc. only in the Sharps container that we provided. One is on the wall next to the double doors that lead to […]
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UPDATE : AV500 – SHIM SYSTEM TAMED – MOSTLY
Dear Users I mentioned last week that a couple of hardware related issues need addressing and this is an update about the first and foremost of them : getting consistent results from Topshim method of shimming for all Lock Solvents. The root cause for the sporadic failure of Topshim, especially for weak lock signals […]
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UPDATE ! : ALL NMR SYSTEMS ARE REVIVED BACK
Dear Users Systems are ready for use. As to the Power being pulled at 3.30 pm yesterday i.e. earlier than announced, everyone was taken by surprise including the building co-ordinators. Indeed it was unexpected but we couldn’t do much about it ! Good Day NMR Facility Manager 8/14/2021
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ALERT ! AV500 – HEADS UP ON THE SHIM RELIABILITY
Dear Users Some of you might have noticed the following but may have chosen to ignore this, since it didn’t affect your 1H spectra much. The current TXO probe is not providing good 2H based shimming results and it needs some close attention. Currently, the instrument can fail to give you good lineshape or Topshim […]
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UPDATE : AV300 – SYSTEM BACK TO NORMAL
Dear Users I have checked that the ATMA operation is now as expected. Please let me know if you notice anything otherwise. If any of you use a lock solvent that is typically out of the ordinary and if you face an ATMA problem, please contact me immediately. It will be a great help. NMR […]
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