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Minimizing the effects of radio-frequency heating in multidimensional NMR experiments

✍ Scribed by Andy C. Wang; Ad Bax

Publisher
Springer Netherlands
Year
1993
Tongue
English
Weight
370 KB
Volume
3
Category
Article
ISSN
0925-2738

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✦ Synopsis

Application of radio-frequency power in multidimensional NMR experiments can significantly increase the sample temperature compared to that of the surrounding gas flow. Radio-frequency heating effects become more severe at higher magnetic field strengths and ionic strengths. The effects are particularly noticeable for experiments that utilize 1H and/or 13C isotropic mixing and broadband decoupling. If radio-frequency power is applied during the systematically increasing evolution period t1, the sample temperature can change with t1 and thereby cause line-shape distortions. Such distortions are easily avoided by ensuring that the average radio-frequency power remains constant during the entire experiment.

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