Pedosphere 3(3): 193--200, 1993
ISSN 1002-0160/CN 32-1315/P
©1993 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Nitrogen Forms in Synthetic Humic Acids Using Nitrogen-15 Nuclear Magnetic Resonance Technique |
| ZHUO SU-NENG, WEN QI-XIAO |
| LMCP, Institute of Soil Science, Academia Sinica, P. 0. Box 821, Nanjing 210008 |
| ABSTRACT |
| 15N-labelled phenolic polymers were synthesized by reactions of p-benzoquinone and 1, 4--diphenol with 15N-labelled glycine and were studied by using 15N CP-MAS NMR technique in combination with chemical approaches. Results showed that the proportion of polymer nitrogen as N-phenyl amino acid N was not as great as expected, only accounting for 5%-15%; and most of N in polymers occurred in the forms of amide, pyrrole-and indole-like nitrogen, aliphatic amines and isonitrile. It seems that great differences existed between synthetic humic acids and soil humic acids in the type and distribution of nitrogen forms. |
| Key Words: |
| Citation: Zhuo, S. N. and Wen, Q. X. 1993. Nitrogen Forms in Synthetic Humic Acids Using Nitrogen-15 Nuclear Magnetic Resonance Technique. Pedosphere. 3(3): 193-200. |
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