The natural line width of low field nuclear magnetic resonance spectra

The authors suggest a procedure for the determination of the natural nuclear magnetic resonance line width Δ ν of liquids using an air coil system at flux densities from 25 μT to 150 μT. Even if the line broadening caused by instrumental field inhomogeneity is much higher than Δ ν, Δ ν can be found...

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Bibliographic Details
Published inJournal of magnetic resonance (1997) Vol. 206; no. 1; pp. 168 - 170
Main Authors Harcken, H., Ketzler, R., Albrecht, M., Burghoff, M., Hartwig, S., Trahms, L.
Format Journal Article
LanguageEnglish
Published United States Elsevier Inc 01.09.2010
Subjects
Algorithms
Coiling
Electromagnetic Fields
Extrapolation
Flux
Inhomogeneity
Line broadening
Liquids
Low field spectroscopy
Magnetic Resonance Spectroscopy - methods
Natural line width
Nuclear magnetic resonance
Protons
Reference Standards
Superconductivity
Temperature
Water - chemistry
Low field spectroscopy
Nuclear magnetic resonance
Natural line width
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Summary:The authors suggest a procedure for the determination of the natural nuclear magnetic resonance line width Δ ν of liquids using an air coil system at flux densities from 25 μT to 150 μT. Even if the line broadening caused by instrumental field inhomogeneity is much higher than Δ ν, Δ ν can be found by extrapolating the measured line width’s field dependency. For pure water this procedure yielded Δ ν = 0.125 Hz ± 0.005 Hz. This is shown to be consistent with the smallest line width found for this sample below 25 μT using a superconducting quantum interference device-based spectrometer.
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ISSN:1090-7807
1096-0856
DOI:10.1016/j.jmr.2010.06.008