Tagged questions

Why are my acetic acid-d4 solvent peaks off from the expected ppm value?

1 1 8k
answers votes views
Hello there. After running an 1H-NMR experiment I observed the acetic acid-d4 solvent peaks at 11.54 and 21.16 ppm (off...
Posted: BONA 11 / Updated: Evgeny Fadeev 5771 Apr 12 '10 at 15:08

two lines in acetone-d6

2 1 5k
answers votes views
We try to setup a used Bruker Avance 200 system. After frequency search we started to setup lock and shim file. Using D2...
Posted: Thomas Tr 11 / Updated: Evgeny Fadeev 5771 Nov 19 '10 at 12:23

Lock at high temperatures

2 1 7k
answers votes views
I am having trouble locking a sample of a polymer dissolved in OCDB at 135 degree's. Can this high temperature interfer...
Posted: Javaslinger 53 / Updated: Gareth Morris 71 Jul 08 '12 at 03:02

Lock 'lost' on Bruker 400MHz NMR

1 1 9k
answers votes views
I had just finished refilling the nitrogen and powering up the NMR after the holiday shutdown and went through the norma...
Posted: Norman Chu 11 / Updated: Roja 26 Jan 07 '13 at 16:11

Lock Error Bruker Ascend 600

2 0 11134
answers votes views
Hi there, We had a short power failure yesterday and since my boss is in Ireland and our other so called NMR guru does...
Posted: Patrick Seibert 1 / Updated: aaaeee 1 Apr 12 '18 at 12:50

Locking in new solvent

2 0 6k
answers votes views
Hello, I am trying to determine solution structure of a peptide in 50% trifluoroethanol(TFE) solution. I dissolved my p...
Posted: GlennG 1 / Updated: JohnW 1 Jul 16 '12 at 15:18

spin lock 1H spectrum

2 0 4k
answers votes views
Please, if somebody wants to help me?! I need to get 1H spectrum with spin lock pulse on Bruker AV 600 instrument. Which...
Updated: gugica 1 Jan 17 '14 at 05:06

log: Failed to find Z0 - low s/n

2 0 4k
answers votes views
Hi, everybody! I met a problem on Varian 400 MR: DMSO samples don't lock by "find Z0" button, but I can find lock signal...
Posted: Ilya N 1 / Updated: Ulrich Haunz 210 Mar 09 '15 at 09:18

Lock problem on Bruker Avance 600 MHz

1 0 6k
answers votes views
After a energy failure (cryoprobe started to warm up) I cannot establish lock (similar to http://qa.nmrwiki.org/question...
Posted: Fabio de Moraes 1 / Updated: aaaeee 1 Apr 12 '18 at 12:47

lock, gradient shimming and acquisition in vnmrj

0 0 8k
answers votes views
Dear all, I want to write a macro that run lock, gradient shimming and acquisition in VnmrJ. I tried two ways, but fail...
Updated: Zhang 1 Sep 24 '17 at 18:43
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