Effects of variations in contact times and copper contents in a 13C CPMAS NMR study of samples of four organic soils

@inproceedings{Preston1984EffectsOV,
  title={Effects of variations in contact times and copper contents in a 13C CPMAS NMR study of samples of four organic soils},
  author={Caroline M. Preston and Robert L. Dudley and Colin A. Fyfe and Suraj Prakash Mathur},
  year={1984}
}
Contact time, Tc, was varied from 0.5 to 4 ms in a 13C CPMAS NMR study of samples of four organic soils differing only in copper content and degree of decomposition. Initial polarization was rapid, with maximum intensity reached at or before 0.5 ms contact time and a large decrease in intensity by 4 ms contact time. The distribution of intensity was determined by dividing the spectra into four regions, corresponding approximately to aliphatic, carbohydrate, aromatic and carboxyl carbons. Three… CONTINUE READING