UW CHEMISTRY NMR
Announcments & Equipment Logs
Spectrometer
UPDATE ! GG500 – INSTRUMENT BACK TO NORMAL
Dear Users The sample handling issue that was reported had since been resolved. The instrument is open for reservation but for a cryogen fill slot this morning. Thank you for your kind understanding. NMR Facility Manager 07/08/2022
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UPDATE ! AV500 – SYSTEM SWITCHED BACK TO 19F CAPABILITY
Hello Users The Probe now In : TXO-19F,13C {1H} – Z gradient Please load the Standard Shim set by doing this on the Topspin command line : rsh stdtxo (In case you are curious, the nucleus/nuclei inside the curly braces is/are the so-called ‘decouple’ nucleus. The probe is typically designed to give the best sensitivity […]
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AV500 : PLEASE NOTE THE TEMPORARY PROBE SWAP
Dear Users We swapped the probe today to BBO as a one time process to access a rare nucleus. Those of you who will use the instrument over the weekend, please note that, this a BBO Probe that includes 1H and X-nuclei coverage, that includes 13C. What you WON’T have is 19F capability. We will […]
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UPDATE ! 500 NMR-s WORKING OK
Dear Users Most probably, there was a power fluctuation in the past day or so that led the 500 NMRs into an unusable state. The situation is remedied and everything looks normal with these instruments. In case you are curious, the 300-s have been behaving OK when I checked this morning. NMR Facility Manager 5/31/2022
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UPDATE ! AV300 – ATMA NOISE ISSUE IS ADDRESSED
Dear Users Some of you had notified us that the V-shaped ‘wobb’ curve was showing lot of noise and ATMA was having issues in tuning/matching automatically. The problem was identified to be localized only to the 1H channel and subsequently, the cause for this has been addressed. My tests today show that the system is […]
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UPDATE : AV500 – RELATED
Dear Users We have been receiving sporadic log posts about the Spin Rate Error and occasional Locking related issues. As I write this, the system is in a normal state and I have recalibrated the sample spinning system and tested it. Locking per se works fine but I have to see if specific solvents are […]
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UPDATE – AV500 ! TXO-1H {13C,19F} PROBE IS BACK
Dear Users As we suspected, a mechanical issue was the cause of 13C channel’s failure. We could fix this in-house with the happy ending that 13C Tune and Match behave pretty smooth now. The TXO probe is back in the magnet, ready to collect data. NMR Facility Manager 12/7/21
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ALERT ! AV500 – POSSIBLE PROBE SWAP TODAY ON THE CARDS
Dear Users The TXO probe has been needing some attention vis-a-vis the 13C channel. As I speak, we are looking into it. If it’s a quick fix in-house, the same probe will go back in the instrument. If not, I will have to place the BBO probe in its place. Sorry for this last minute […]
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UPDATE : AV300 – SHIMMING ISSUE RESOLVED
Dear Users At least some of you had informed us about Topshim failure. The root cause of this has been identified and rectified. With standard sample, everything behaved OK. Nevertheless, if you see issues with your own samples in different solvents, please reach out again without any hesitation. Your feedback is very important to us, […]
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UPDATE ! AV300 – IS BACK TO NORMAL OPERATION – PLEASE BOOK TIME AS NEEDED
Dear Users The two seemingly small, but pesky problems have been sorted out, with our recent computer maintenance operations: You can comfortably “Drag and Drop” your datasets onto the ‘blue’ screen area, without freezing the screen now. In the login screen, when you type your password, it NO LONGER truncates it on its own and […]
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