State of the art of CPMAS 13C-NMR spectroscopy applied to natural organic matter
- Authors: CONTE P; R SPACCINI; A PICCOLO
- Publication year: 2004
- Type: Articolo in rivista (Articolo in rivista)
- OA Link: http://hdl.handle.net/10447/32775
Abstract
The structural and conformational characteristics of humic carbon backbones were studied using NMR spectroscopy. Cross-polarized spectroscopy was used to investigate the composition of purified humic substances. High spin rate was obtained by reducing the size of rotors. Protons irradiation eliminated the heteronuclear dipolar interactions. It was found that the NMR signals were reduced due to the mobility of humic material inside the rotors.