Cross polarization, magic-angle spinning 13C nuclear magnetic resonance spectroscopy of soil humic fractions
| Autor: | Sáiz-Jiménez, Cesáreo, Hawkins, B. L., Maciel, G. E. |
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| Přispěvatelé: | Comisión Asesora de Investigación Científica y Técnica, CAICYT (España), University of Colorado, National Science Foundation (US) |
| Rok vydání: | 1986 |
| Předmět: | |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Cross polarization, magic-angle spinning 13C nuclear magnetic resonance spectroscopy was used to characterize humic fractions isolated from different soils. The acid fractions are more aromatic than the humin fractions, probably due to the higher polyssaccharide content of humins. However, fulvic acid fractions are more aromatic than the corresponding humic acid and humin fractions. These results can be interpreted in terms of the isolation procedure, because the high affinity of Polyclar AT for phenols results in higher aromaticities as compared with other isolation methods (e.g. charcoal). The Colorado State University Regional NMR Center, funded by National Science Foundation Grant Number CHE-8208821, and partíal support of this work by the Colorado Sta te University Experiment Station and by the CAICYT of Spain. |
| Databáze: | OpenAIRE |
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