UW CHEMISTRY NMR
Announcments & Equipment Logs
ALERT ! DRX499 – VT SYSTEM ISSUES
The VT air chiller unit is not functioning as expected and as a result, you cannot reach nominal temperatures below room temperatures as of now. Although you can operate in the high temperature range, the stability will be poorer than (+/-)0.1 deg. C. I will address the issue in an expedited manner but the fix […]
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AV700 SOLIDS NMR USAGE : BRIEF CLARIFICATION
Unlike the solutions spectrometers, solid state NMR instrument is not amenable to a walk-on mode of operation, by the very nature of this spectroscopy. First of all, the technique requires the use of an expensive rotor (approx. cost $1000/- ) in place of the NMR tube that costs about $10/-. The sample preparation also needs […]
Posted in NMR Applications, Spectrometer, Usage | No Comments
ALERT ! AV700 USERS – IMMINENT CHANGE – SOLUTIONS TO SOLIDS STARTING NEXT WEEK
The 700 will switch to solid state NMR mode beginning April 16th, Monday. It is expected that the instrument will remain in solids operation for a minimum of 2 weeks and it might extend to a month. All solutions users should take note and plan accordingly. NMR Facility Manager 4/11/2018
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UPDATE ! AV700 – VT SYSTEM IN BACKUP MODE
Please note that the extreme chiller unit is malfunctioning again and we have provided a backup chiller that can take your sample to 0 deg. C and not below. Currently we don’t have an estimate of when the low temperature capability using the default chiller will become available. I will post an update sometime tomorrow […]
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AV700 – J-YOUNG SAMPLE TUBE USERS – PLEASE READ !
I am picking up from my last post on the Sample Handling change in AV700. If you bring a J-Young tube, please confirm its straightness with the special Aluminum tester that is atop the NMR console from now on, we recommend you to use only the Ceramic Spinner, which balances the center of mass closer […]
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IMPORTANT NOTE ! AV700 USERS – SAMPLE HANDLING, PLEASE READ
To tackle the recurrent issue of J-Young sample tubes getting stuck inside the magnet, we are coming up with an alternative that shows promise in addressing the issue. J-Young Tubes : You must only use the ceramic spinner shown below from now on : Regular NMR Tubes : You must use the PEEK PLASTIC spinner […]
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UPDATE – AV700 USERS : VT SYSTEM OPERATIONAL – READY FOR USE
You can block time and start using the instrument. I will follow up with an important post about sample handling. NMR Facility Manager 3/23/3018
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ALERT ! AV700 USERS : SYSTEM DOWN UNTIL TOMORROW
The VT system has developed an ice block problem which is being treated currently. The system should be ready for regular use by tomorrow morning i.e. Friday, the 23rd. All the existing reservations for the day are canceled owing to this. Please look for my confirmation about the instrument health before blocking time tomorrow. NMR […]
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UPDATE : NO IMPACT DUE TO POWER SHUT DOWN NEXT WEEK
The good news is that the NMR lab i.e. Rm.37 is not going to be affected by the planned power shut down for couple of hours, next week. The building coordinator Eric Strakbein assured me that he will update this status if there is any imminent change to the same. As of now, the facility […]
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REMINDER ! OBSERVING X-NUCLEI IN AV500 and DRX499
Please remember the following. You should make sure that the X-channel cable is connected to the correct nucleus port on the probe head, before you tune/match or observe NMR signal from that nucleus. For instance, on AV500 : If you want to observe 13C, make sure that the RF cable is connected to the 13C […]
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