UW CHEMISTRY NMR
Announcments & Equipment Logs
AV500 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 AV500 instrument by submitting an entry using the “Post Log Entry” box found below.
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269 Responses to “AV500 Log Book”
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There are currently no issues with the wobb/tune & match system nor with the VT system.
The wobb curve isn’t stable and is moving significantly without me adjusting either the tune or the match.
The sample will not cool below 295 K.
the dummy sample has disappeared
A previous user left the probe at a hot temperature again. Luckily, this time I checked so my kinetics expt wasn’t ruined!
Console was not functioning properly; sample “Missing” light remained on, spin on/off was blinking, and spin & lift functions were not responsive. However, after running a test 1D the console “unstuck”. Curious.
Test with the H2O/D2O sample and chloroform in Acetone-d6 show no issues with the lock system. Lock is behaving normal, as is the shim system.
The magnet keeps increasing the lock gain and then losing it’s lock. The lock signal has a constant wave shape to it, when it is locked.
Sunday @ 1pm – Noticed that a previous user left the temperature set at 50 deg C.
When I run the phosphorous standard, I get a peak around 185 ppm. It generally does not give a signal too far away from 0 ppm. As well, the screen resolution is too low.