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posted Jan 21 at 14:49

Evgeny%20Fadeev's gravatar image

Evgeny Fadeev
2571

Anti-diagonal artefact in DQF COSY (Varian dqcosy.c)

Hi I have the following problem in dqfcosy - have pretty strong antidiagonal.

I've run the same experiment before on other samples and did not have this problem, could you suggest anything? Is there any other pulse sequence in the Varian toolchest superior to this one?

image illustrating antidiagonal artefact in dqfcosy nmr experiment

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No.1 Revision

posted Jan 21 at 14:51

Evgeny%20Fadeev's gravatar image

Evgeny Fadeev
2571

Anti-diagonal artefact in DQF COSY (Varian dqcosy.c)

Hi I have the following problem in dqfcosy - have pretty strong antidiagonal.

I've run the same experiment before on other samples and did not have this problem, could you suggest anything? Is there any other pulse sequence in the Varian toolchest superior to this one?

image illustrating antidiagonal artefact in dqfcosy nmr experiment

edit: sorry there is some bug with the image upload. I'll fix it shortly.

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No.2 Revision

posted Jan 21 at 14:56

Evgeny%20Fadeev's gravatar image

Evgeny Fadeev
2571

Anti-diagonal artefact in DQF COSY (Varian dqcosy.c)

Hi I have the following problem in dqfcosy - have pretty strong antidiagonal.

I've run the same experiment before on other samples and did not have this problem, could you suggest anything? Is there any other pulse sequence in the Varian toolchest superior to this one?

image illustrating antidiagonal artefact in dqfcosy nmr experiment... but probably something is just wrong with my setup. Hmm, there's not much to mess up in that sequence :).

edit: sorry there is some bug with the image upload. I'll fix it shortly.image illustrating antidiagonal artefact in dqfcosy nmr experiment

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No.3 Revision

posted Jan 21 at 14:57

Evgeny%20Fadeev's gravatar image

Evgeny Fadeev
2571

Anti-diagonal artefact in DQF COSY (Varian dqcosy.c)

Hi I have the following problem in dqfcosy - have pretty strong antidiagonal.

I've run the same experiment before on other samples and did not have this problem, could you suggest anything? Is there any other pulse sequence in the Varian toolchest superior to this one?

... but probably something is just wrong with my setup. Hmm, there's not much to mess up in that sequence :).Or is it normal and I just have low S/N?

image illustrating antidiagonal artefact in dqfcosy nmr experiment

click to hide/show revision 5
No.4 Revision

posted Jan 21 at 14:57

Evgeny%20Fadeev's gravatar image

Evgeny Fadeev
2571

Anti-diagonal artefact in DQF COSY (Varian dqcosy.c)

Hi I have the following problem in dqfcosy - have pretty strong antidiagonal.

I've run the same experiment before on other samples and did not have this problem, could you suggest anything? Is there any other pulse sequence in the Varian toolchest superior to this one?

... but probably something is just wrong with my setup. Or is it normal and I just have low S/N?

image illustrating antidiagonal artefact in dqfcosy nmr experiment

click to hide/show revision 6
No.5 Revision

posted Jan 21 at 14:58

Evgeny%20Fadeev's gravatar image

Evgeny Fadeev
2571

Anti-diagonal artefact in DQF COSY (Varian dqcosy.c)

Hi I have the following problem in dqfcosy - have pretty strong antidiagonal.

I've run the same experiment before on other samples and did not have this problem, could you suggest anything? Is there any other pulse sequence in the Varian toolchest superior to this one?

... but probably something is just wrong with my setup. setup, it is a really simple sequence though and I thought it would be hard to screw up :). Or is it normal and I just have low S/N?

image illustrating antidiagonal artefact in dqfcosy nmr experiment

click to hide/show revision 7
silly push-update edit

posted Jan 22 at 09:08

Evgeny%20Fadeev's gravatar image

Evgeny Fadeev
2571

Anti-diagonal artefact in DQF COSY (Varian dqcosy.c)

Hi I have the following problem in dqfcosy - have pretty strong antidiagonal.

I've run the same experiment before on other samples and did not have this problem, could you suggest anything? Is there any other pulse sequence in the Varian toolchest superior to this one?

... but probably something is just wrong with my setup, it is a really simple sequence though and I thought it would be hard to screw up :). Or is it normal and I just have low S/N?

image illustrating antidiagonal artefact in dqfcosy nmr experiment

click to hide/show revision 8
No.7 Revision

posted Jan 23 at 12:09

Evgeny%20Fadeev's gravatar image

Evgeny Fadeev
2571

Anti-diagonal artefact in DQF COSY (Varian dqcosy.c)

Hi I have the following problem in dqfcosy - have pretty strong antidiagonal.

I've run the same experiment before on other samples and did not have this problem, could you suggest anything? Is there any other pulse sequence in the Varian toolchest superior to this one?

... but probably something is just wrong with my setup, it is a really simple sequence though and I thought it would be hard to screw up :). Or is it normal and I just have low S/N?

edit: I've figured out that in this case I had receiver overflow. To test that go to the .fid directory of the experiment and inspect file called log.

image illustrating antidiagonal artefact in dqfcosy nmr experiment

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