Predicting aquisition time needed depending on sample concentration

0 0 108
answers votes views
Hi , is there a way of predicting aquisition time needed depending on sample concentration in order to get a decent spe...
Posted: gravatar 49 17 hours ago

bigger MAS-NMR spectrum as irradiation window

0 0 227
answers votes views
Hi, I have a sample with a very very big CSA which is broader than my irradiation windows, so I have to acquire my dat...
Posted: Thiazole 1 2 days ago

J-value command

2 0 35
answers votes views
Hi I have a 500MHz BRUKER NMR. How I can access to J-value at COSY experiment? what's that command? ...
Posted: Saeed 1 / Updated: PQdotL 1 2 days ago

problem with large dosy files

2 0 65
answers votes views
Hello, I run DOSY expt successfully but my dosy files are very massive and they take up large amounts of disk space. Ho...
Posted: elham 3 / Updated: Arkadiusz Leniak 162 Dec 15 at 13:42

Topspin: usage of l0 and d0

2 0 72
answers votes views
Dear all, In topspin, what's the initial value for l0, 0 or 1? what's the initial value for d0, 0 or in0? Thanks in ad...
Updated: Frey 61 Dec 12 at 01:14

1H-15N CSP

0 0 56
answers votes views
I have a basic question. Why or when should one use deviation from average chemical shift change rather than absolute va...
Posted: Mahavir Singh 1 Nov 27 at 05:10

1H-15N HMBC of small molecules

1 0 77
answers votes views
When I used the automatic peak picking function of Topspin for picking the cross peaks in a 1H-15N HMBC spectrum, two cr...
Updated: Bhanu 1 Nov 27 at 20:23

Running a wet sequence

2 0 72
answers votes views
Hi, I am trying to run a wet sequence but I'm having trouble getting good results on a sample with 90:10 water:methanol...
Posted: gravatar 49 / Updated: Pete Gierth 366 Dec 05 at 10:35

coupling constants

3 0 98
answers votes views
Hi, does anybody know 1H-79Br coupling constants? I found in literature only 13C-79Br coupling constants! Thank you, Mar...
Posted: gugica 1 / Updated: Arkadiusz Leniak 162 Dec 07 at 02:28

What is the actual point of dummy scans?

3 0 172
answers votes views
Hi, I was wondering why so many pulse programs use dummy scans. Correct me if I'm wrong but I think dummy scans are supp...
Posted: gravatar 49 / Updated: Pete Gierth 366 Dec 05 at 10:44

Frequency of signal in the second dymension

0 0 2k
answers votes views
Let me consider a proton experiment done on a 500 MHz spectrometer. The signal coming from the sample has a frequency of...
Posted: PQdotL 1 / Updated: dstephenson 56 2 days ago

Inverse FT of NUS data

3 0 132
answers votes views
Does anyone know the way to create a full ser file from Bruker NUS processed data? I want to do this so that others (wi...
Posted: John Hollerton 96 / Updated: Pete Gierth 366 Dec 05 at 11:19

BSMS error message

3 0 143
answers votes views
Hi what is the HOLD LOCK message on BSMS key pad? How can I fix it? Thanks ...
Posted: elham 3 / Updated: Arkadiusz Leniak 162 Nov 16 at 18:18

Weak NOE signals, serious t1 noise

5 0 217
answers votes views
Since my university does not have a professional spectroscopist, I am a new learner of NMR, and I really have no one els...
Posted: Elvis 1 / Updated: RuudA 11 Nov 02 at 07:22

Why so much spam?

3 2 176
answers votes views
Hi, I really like this forum and I am harrowed to see it so spammed. We should find a way to end this(maybe more admins...
Posted: gravatar 49 / Updated: Ulrich Haunz 177 Oct 24 at 07:09

19F 2D experiments

3 0 190
answers votes views
Hi, I would like to run some 19F NOESY, and 19F-1H correlation experiments on a totally fluorinated sample (no H) with a...
Posted: AnneBaudouin 1 / Updated: RuudA 11 Nov 02 at 07:44

NH---O hydrgen bond detection in N-(2-methoxyphenyl)benzamide

1 0 4k
answers votes views
I'd like to know if there are further NMR spectroscopic methods to detect NH---O hydrogen bond in N-(2-methoxyphenyl)ben...
Posted: Alessia 1 / Updated: Arkadiusz Leniak 162 Oct 24 at 00:48

topshim error 84

1 0 198
answers votes views
I tried to perform topshim on my AV-300 but it say : "BsmsRCBSlope - setting RCB ramp failed - Error 84:BSMSExcessive Co...
Posted: Bourdreux Flavien 1 / Updated: Kirk Marat 686 Oct 14 at 14:28

Measuring T1 for a low concentration (1mM) compound in water.

1 0 1k
answers votes views
Hi, I'm trying to measure T1 for a compund at 1mM in water using t1ir. Seeing how my concentration is so low, phasing m...
Posted: gravatar 49 / Updated: Ulrich Haunz 177 Oct 23 at 08:39

TOCSY of peptide in micelle

0 0 1k
answers votes views
Hi, I am a PhD student starting in NMR and I have two questions. I have a problem with a TOCSY and natural abundance ...
Updated: paul atray 1 Sep 17 at 10:16

au for 1H and 31P with iexpno and ssleep for kinetics

1 0 493
answers votes views
hi there. I want to establish an au with the following content: I want to measure 1H and 31P make ssleep (userdefined)...
Posted: charlez miller 1 / Updated: Ulrich Haunz 177 Sep 22 at 06:25

setting Z0 on agilent nmr equipment

0 0 172
answers votes views
I use an agilent 400 MHz equipment. Would like to know how to set the Z0 to around -3500 ...
Posted: olatomide fadare 1 Sep 11 at 16:15

polymer NMR

1 0 703
answers votes views
Why are NMR peaks of flexible polymers usually broad? Is it due to the intramolecular proton J coupling among different ...
Posted: timlo 1 / Updated: Arkadiusz Leniak 162 Sep 09 at 10:05

Which Bruker HSQC program do you use?

5 0 771
answers votes views
Hello, could you tell me which HSQC and E-HSQC program are recommendable ? These are Bruker HSQC pulse programs: hsqcp...
Posted: lithiumamide 1 / Updated: RuudA 11 Sep 10 at 11:46

Oxford Instruments 2.2K 800/63 pumped magnet

1 0 651
answers votes views
Dear all, our Oxford 800 Mhz pumped magnet is monitored using a windows 95 pc. The autodial is still running but we wer...
Posted: Ruud 1 / Updated: RuudA 11 Sep 25 at 03:37

Spam that is lately spawning in wiki

2 3 621
answers votes views
Greetings, I want to ask if someone knows what's going on in here with this spam about FIFA, some online games, etc. ? ...
Updated: Arkadiusz Leniak 162 Sep 23 at 13:08

Tool for Subsampling Uniformly-Acquired Data to Mimic NUS Spectra

1 0 4k
answers votes views
Hello all, I have several 2D and 3D data sets acquired using Bruker spectrometers in the standard uniform sampling fash...
Updated: ChemMJW 99 Aug 23 at 20:43

what does autoshim in the topspin bsms do?

1 0 425
answers votes views
Hi, in the bsms gui there's an autoshim button. What does this function do exactly? Is it similar to topshim or is it a...
Posted: gravatar 49 / Updated: Ulrich Haunz 177 Aug 20 at 06:16

Tool to extract several NMR spectra into text file format?

2 0 340
answers votes views
Hi As a newbie in the NMR world I hope you guys can help me out with a simple Q: I have 104 1D spectra I would like to t...
Posted: Michael 1 / Updated: John Hollerton 96 Sep 10 at 03:36

15N 90 degree hard pulse calibration

4 0 10657
answers votes views
Greetings, I want to ask for some advice in matter of 15N hard pulse calibration on Bruker machines. I'm working on Avan...
Updated: Arkadiusz Leniak 162 Aug 25 at 04:18

vnmrj spectra in mnova

3 0 451
answers votes views
I have been trying to open varian vnmrj spectra in mnova software to workup the spectra, but I keep getting error messag...
Posted: Carolyn Shetter 1 / Updated: Ulrich Haunz 177 Aug 13 at 05:09

Topspin 2.1 error message with Windows 7 OS

3 0 1k
answers votes views
Hi all, I have been running TopSpin 2.1 on my Windows 7 32-bit OS for the last few years and now am getting this annoyin...
Posted: Olivia 1 / Updated: Ulrich Haunz 177 Nov 14 at 03:16

why choloroform gives a negative triplet instead of a positive

3 0 4k
answers votes views
Hello, why choloroform gives a negative triplet instead of a positive(just one hydrogen on the carbon) in DEPT 135. Can ...
Updated: zikoooo 3 Jul 29 at 01:20

How to integrate CDCl3 (d-chloroform) peak area which is overlapped with other peaks?

4 0 3k
answers votes views
Hi All, I would like to get suggestion about how to integrate the peak area of CDCl3 which is overlapped with other pea...
Posted: Jiping Yang 1 / Updated: John Hollerton 96 Sep 10 at 03:53

Air dryer system issues

2 0 6k
answers votes views
We have a pressure-swing adsorption air dryer that is identical to the one shown here on the NMR wiki (Balston 75-20, cu...
Posted: slongwell 3 / Updated: Jerry Hirschinger 189 Jul 23 at 06:50

simple stddiff parameters

1 0 4k
answers votes views
Hi, I'm working on a bruker avance 400 spectrometer and using topspin version 1.3 software. I want to get a std-nmr (sat...
Updated: nfromdicle 1 Jul 12 at 05:56

Watergate spikes around solvent

0 0 465
answers votes views
Hi, When I use my watergate I get symmetrical spikes around the residual water signal. Is there a way of minimizing the...
Updated: gravatar 49 Aug 20 at 07:47

167ppm CH of a indole

1 0 416
answers votes views
I have a proton value at 8.07ppm and carbon 167ppm correlate to a CH proton I think it's a proton at 3 position of a ind...
Posted: din 1 / Updated: VVK 61 Jul 08 at 04:34

how do you use topshim 3d in topspin?

2 0 1k
answers votes views
Hi, when I try to use topshim 3d i get an error message saying that it can only be used for 1H although 1H is what I use...
Posted: gravatar 49 / Updated: Arkadiusz Leniak 162 Jul 07 at 07:39

Translating Varian to Bruker, "phase=1,2"

1 0 2k
answers votes views
I'm trying to translate a Varian pulse sequence into a Bruker pulse program. For the Varian Inova sequence with the par...
Posted: Craig Grimmer 31 / Updated: vltr 1 Jul 14 at 13:17

INADEQUATE EXPERIMENT WITH BBI PROBE?

4 0 899
answers votes views
Is it possible to obtain this experiment with a BBI 400 MHz probe? All the tries I have made they have been unsuccessful...
Posted: Gohuma1 1 / Updated: Arkadiusz Leniak 162 Jun 26 at 19:35

Software to simulate pulse sequences

1 0 447
answers votes views
Hi, I'm interested in software for windows or linux that simulate the effect of pulses, delay AND gradients using the pr...
Posted: marcs 11 / Updated: Bharathwaj 112 Jun 22 at 08:15

Topspin3.2 deconvolution, border peaks are cutted off

1 0 818
answers votes views
Greetings, I've some annoying issue with Topspin and deconvolution. No matter what I'm trying to do, border peaks are a...
Posted: Arkadiusz Leniak 162 / Updated: Ulrich Haunz 177 Jun 16 at 07:48

gradients for 195Pt

2 0 394
answers votes views
Dear colleagues! tell me please how to calculate the gradients for carrying out 2D experiment with 195Pt (HMBC, HSQC)? ...
Updated: OLEL 1 Aug 15 at 03:17

How can you read a FID dile with topspin?

2 0 455
answers votes views
Hi, I found a spectrum I'm interested in on the hmdb database, say for example at the end of this page http://www.hmdb....
Posted: gravatar 49 / Updated: Arkadiusz Leniak 162 Jun 14 at 02:00

Processing of spectra in Bruker Topspin

0 0 1k
answers votes views
Can anyone suggest important parameters need to be optimized for 3DNMR data processing and correct phasing of cross pea...
Updated: Arun Gupta 11 Jun 08 at 03:04

TopSpin: 3D experiment with vc list

2 0 4k
answers votes views
Question about how to make a 3D experiment in which one of the dimensions is a variable counter (vc) list. I'm using Top...
Updated: DaanMR 1 Jun 05 at 08:26

why is the number of scans in watergate a multiple of 8?

2 0 4k
answers votes views
Hi, In the p3919gp the number of scans is a multiple of 8 which makes optimizing this experiment a bit of a pain. can a...
Posted: gravatar 49 / Updated: Arkadiusz Leniak 162 Aug 20 at 00:32

Topspin 3.2.1 - 1D TOCSY in with differing mixing times

4 1 3k
answers votes views
Hello, I work a lot with compounds containing numerous carbohydrate groups. Therefore I use frequently 1D-TOCSY experim...
Posted: zablociak 11 / Updated: Alain Pagelot 1 Jun 10 at 02:38

19F full range homodecoupling

3 0 3k
answers votes views
Greetings, this is my first question in this wiki :) I wonder if there's possibility to obtain full homo decoupled spe...
Updated: Arkadiusz Leniak 162 Jun 16 at 00:14
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