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The effect of sample hydration on 13C CPMAS NMR spectra of fulvic acids

January 1, 1991

Three fulvic acids, two of which have been well studied by a number of other groups (Armadale and Suwannee river fulvic acids) have been examined by high resolution solid-state 13C-NMR techniques to delineate the effect of absorbed water. Two main effects of absorbed water were observed: (1) changes in spin lattice relaxation times in the rotating frame and cross polarization times and (2) total loss of signal so that some fulvic acid is effectively in solution. These results suggest that discrepancies in the literature concerning observed relative signal intensities from different structural groups are due to absorbed water and emphasize the necessity for proper precautionary drying before spectroscopic analysis. ?? 1991.

Publication Year 1991
Title The effect of sample hydration on 13C CPMAS NMR spectra of fulvic acids
Authors Patrick G. Hatcher, M. A. Wilson
Publication Type Article
Publication Subtype Journal Article
Series Title Organic Geochemistry
Index ID 70015032
Record Source USGS Publications Warehouse