Die Struktur der Huminstoffe wurde lange Zeit kontrovers diskutiert. Speziell ihr hoher Sauerstoffgehalt war bisher nicht zu erklären. Untersuchungen in Lösung halfen nicht weiter. Die CP‐MAS‐13C‐NMR‐Spektroskopie ermöglichte nun bei den Feststoffen eine genaue Zuordnung der Strukturelemente. Aliphatische Teilstrukturen bilden demnach das Grundgerüst der Huminstoffe; unter den sauerstoffhaltigen Gruppen dominieren aliphatische Ether. – Diese Befunde sind auch für das Verständnis der Genese fossiler Brennstoffe von Bedeutung.
The structure of humic substances has long been a subject of controversy. In particular, their higher oxygen content could not be explained. Studies in solution did little to help. CP‐MAS‐13C‐NMR spectroscopy of the substances in the solid state has now permitted precise assignment of the structural elements. Aliphatic part‐structures comprise the framework of humic substances; of the oxygen‐containing groups, aliphatic ethers dominate.—These findings are also of importance in understanding the genesis of fossil fuels.
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