UW CHEMISTRY NMR

I am trying to satiate the possible curiosity of some of you who might be wondering what is the substance of  the ‘VT troubleshoot’ you have been observing on the calendar.  Observations show that, when we try data collection at extreme temperature limits such as +70 C,  the target temperature very slowly drifts down i.e. […]

The 1H channel tune/match is malfunctioning.  We will try to provide an alternative as soon as we can. Until further notice, the instrument is down.  Thank you for your cooperation. NMR Facility Manager 6/2/16

We will be doing the needful to safely eject the sample and bring the system to normal. Until further notice, the spectrometer cannot be used. Please look for updates on the issue later. NMR Facility Manager 6/2/2016

We have managed to fix the X-channel in house and also replaced broken parts where the sample resides inside the probehead.   Since things look  pretty good with the probe (see image of water suppression : BBI_Sucrose_ES_after_fix ) we are releasing the instrument for use  with BBI probe in place.   We will check a few more […]

The BBI probe  X-channel needs extensive troubleshooting to fix the tuning/matching problem outlined earlier. In its place, we have put the BBO probe as a surrogate. Since this is the first time this probehead is being used in this magnet, it might take longer than usual to prep the probe with optimal shims etc.  We […]

The BBI probe is observed to have some grounding issues on the X-channel, that makes tuning/matching difficult when you run ‘wobb’.  We will remove the probe to take care of this on the bench on Monday forenoon, the 2nd May ’16.  I expect this to be a short operation. NMR Facility Manager 4/29/16

The probehead is fixed. We are yet to complete some temperature stability tests after the repair but this will be taken up tomorrow or later.  As of now, users are invited to start using the instrument.

Probehead has a broken insert glass and we are in the process of fixing the issue. We are hopeful the instrument will return to regular use before the end of the day.  Nevertheless,  users who blocked the instrument this afternoon might consider cancelling the time and look at other instruments.