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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The Wobb curve for 31P is not responding to tune or match knob.
Wobb curve not responding to tune or match knob movement, match stuck off-scale high on controller box. Tried full range on both knobs, no movement of the curve, match never came on scale, tune would either stay at center or be off scale right.
Would not allow me to log in. The screen was a blank blue background
The wobb curve for 31P looks like back of an upside-down camel with two humps.
Used AV500 on sat and Sun. Spurious, sharp peak at 3.5 ppm,not from sample. Any comments?
Wobb for 1H NMR is not stable.
I did several 13C NMR recently (in CDCl3) and found that the S/N was very high, even for a 1 hour scan. Peaks can hardly be identified. This is abnormal compared to my previous experience using this instrument. By the way, 1H NMR works well.
Fri 12-22-17 at the 500 MHz instrument, the sample eject of the dummy tube will not happen. Topspin gave an error message that there is a spin rate error. Logging out then in does not fix the problem.
Wobb not stable enough for T/M (18:45)
Wobb not stable enough to T/M