Details

Autor(en) / Beteiligte

• Hibino, Y.
• Sugahara, K.
• Muro, Y.
• Tanaka, H.
• Sato, T.
• Kondo, Y.

Titel

Simple and low-cost tabletop NMR system for chemical-shift-resolution spectra measurements

Ist Teil von

• Journal of magnetic resonance (1997), 2018-09, Vol.294, p.128-132

Ort / Verlag

United States: Elsevier Inc

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •We improved a tabletop NMR system by adding shimming mechanism with iron screws.•We obtained such a frequency resolution in NMR spectra so that signals from protons in a methyl and carboxy group were resolved.•The improved tabletop NMR system is suitable for education. We have been working on developing a low-cost tabletop NMR system. We reported that a field homogeneity as high as 50 ppm was achieved with a simple NMR magnet by employing two facing ferrite magnets with iron disks in between (Chonlathep et al., 2017). In this paper, we report two improvements added to our previous system: (1) an FPGA based signal processing unit to improve the S/N ratio and (2) a simple shimming mechanism to improve the field homogeneity. We obtained as high as 1 ppm field homogeneity in the best case. The signals from hydrogen nuclear spins in a methyl and carboxy group in acetic acid were resolved in NMR spectra.