UW CHEMISTRY NMR
Announcments & Equipment Logs
AV300 Log Book
Welcome to the Chemistry NMR Online Log Book – your One Stop portal to communicate about the spectrometer to the Facility Staff in a timely manner.
Please record your comments and relevant observations about AV300 instrument by submitting an entry using the “Post Log Entry” box found below.
Subscribe to AV300 logs
305 Responses to “AV300 Log Book”
« Previous 1 … 14 15 16 17 18 … 31 Next »
topshim not working properly
Locking onto C6D6 would not work..
The source of the problem was a user dropped their sample into the magnet without first placing it in the sample spinner.
Please always use the sample spinner!
The av300 is operational.
Actually the NMR is not taking a spectrum of my sample. it looks like just a large DCM peak and I am running a commercial sample which should be pure and clean.
After injecting the sample, it never goes from the missing to down command. I can still take NMR, but the light never changes.
Had to use the lock command twice to get an accurate signal for sample
The lock is not working on the 300. I tried locking on CD2Cl2 and no luck.
1H atma not working. Tried atmm, but dip wouldn’t move regardless of how much tuning and matching was changed. Ended up switching to AV301
The 31P atma command is still incredibly slow: timed at 5 minutes to complete. I had the same error as Jenny when I tried to stop the atma and restart (and also try atmm).
31P atma was taking a very long time so I switched to atmm but couldn’t center at all. Then I got stuck in a cycle where I tried to “stop” and then restart the atma but it said that atma was already running although it wasn’t showing up…not sure how to properly cancel atma beyond “stop”.