Solid state CPMAS 13C and 15N NMR spectroscopy in organic geochemistry and how spin dynamics can either aggravate or improve spectra interpretation

► Solid state NMR spectroscopy as a powerful tool for the characterization of SOM. ► Useful acquisition parameters for obtaining reliable NMR data of SOM. ► Analysis of Fe-oxides-SOM interactions by NMR. ► NMR-relaxation data as an additional tool for structural analysis of SOM. ► Spinning side bands may disturb intensity distribution in NMR spectra of SOM.