UW CHEMISTRY NMR
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GG500 Log Book
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Please record your comments and relevant observations about DRX499 instrument by submitting an entry using the “Post Log Entry” box found below.
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304 Responses to “GG500 Log Book”
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multi_zgvt, multizg, and related macros non-functional. Cannot reset temperature at end of run, or run multiple experiments in sequence. Is an alternative command functional?
On proton channel, the tune and match is shifting significantly, even over short periods of time. When I re-checked wobb after 10 minutes, I couldn’t even see a parabola anymore…
The instrument is not cooling below ~293 K. Low-temperature runs are not possible.
Here is another test message for Adrienne. Hi ! This is Thursday the 20th June, a cloudy day.
printer is still not connected to the instrument.
printer is not connected or set as the default to actually be able to print anything… I thought the printer was supposed to be working now?
Sam
H2O+D2O will give a FWHM anywhere between 10 to 20 Hz. This sample is not a good one to test lineshape issues. One of us will take a look.
The shims are fairly atrocious this afternoon. After 20 minutes of shimming (starting from the standard shim file), my line widths still aren’t better than 6-7 Hz (full width, half-height). The sample is homogeneous (and gave a much better spectrum this morning on the 301 and this instrument).
To double check that my sample wasn’t the issue, I’ve just loaded the standard shim file and recorded a spectrum of the dummy sample (H2O/D2O). This too has line width around 8 Hz (fwhh). This seems fairly poor?
The lock/lockdisp issue has been resolved.
I received an error message after typing “lockdisp” that read “Error opening spect:/dev/tty03 locked by process 8655” After pushing close, another error came up reading “No acquisition hardware available for:: 128.95.172.145”