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Supplemental Shimming for HR-μMAS NMR Spectroscopy

Abstract : Occasionally in proton high-resolution magic angle spinning nuclear magnetic resonance spectroscopy (1H HR-MAS NMR), the standard field shimming across the region-of-interest with the active shims is not sufficient in the presence of substantial magnetic susceptibility gradients. This can be ascribed to the presence of large air pocket within the sample, the proximity between sample and probehead (especially with micro-sized probes), or data acquisition at high magnetic fields. Herein, the study demonstrates a simple approach to enhance the capacity of the shim fields—by supplementing a specific passive ferro-shim—for unifying the field distributions across the sample. Qualitative field numerical analyses were carried out to illustrate the effectiveness of the applied passive shims together with the active shims.
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https://hal-cea.archives-ouvertes.fr/cea-02265794
Contributor : Serge Palacin <>
Submitted on : Monday, August 12, 2019 - 1:56:37 PM
Last modification on : Monday, February 10, 2020 - 6:12:49 PM

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Masahide Nishiyama, Covadonga Lucas-Torres, Renzhong Piao, Yoshinori Yanagisawa, Yusuke Nishiyama, et al.. Supplemental Shimming for HR-μMAS NMR Spectroscopy. Applied Magnetic Resonance, Springer Verlag, 2019, 50, pp.1305-1313. ⟨10.1007/s00723-019-01150-8⟩. ⟨cea-02265794⟩

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