1H nutation experiments under low-amplitude radiofrequency fields Quantitative analysis of a complex NMR signal arising from water in clays and including a Pake doublet

Autor: Trausch, Gregory, Canet, Daniel
Přispěvatelé: Structure et Réactivité des Systèmes Moléculaires Complexes (SRSMC), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2007
Předmět:
Zdroj: Magnetic Resonance Imaging
Magnetic Resonance Imaging, Elsevier, 2007, 25 (4), pp.525-528. ⟨10.1016/j.mri.2006.11.010⟩
ISSN: 0730-725X
DOI: 10.1016/j.mri.2006.11.010⟩
Popis: International audience; It is shown theoretically and experimentally that, under weak radiofrequency (RF) field conditions, nutation frequency depends on relaxation times. The Fourier transform of a nutation curve, which is obtained by plotting signal amplitude as a function of RF field application time, yields separate bands corresponding to the components of an unresolved composite signal. This can be effectively achieved provided that these components possess different relaxation characteristics. Using proton nuclear magnetic resonance, this new method is applied to the study of water in clays and leads to the proportion of different types of water. The case where one water species appears in the form of a Pake doublet is considered.
Databáze: OpenAIRE
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