Studies on tile composition of aromatic nuclei of humus
Open Access
- 1 November 1970
- journal article
- research article
- Published by Taylor & Francis in Soil Science and Plant Nutrition
- Vol. 16 (6) , 250-255
- https://doi.org/10.1080/00380768.1970.10433373
Abstract
X-ray diffraction analysis of humic acid (1) revealed that. among four types of humic acid. A. D. Rp and P type according to the classification system proposed by Kumada (2), only A type had the distinct diffraction band corresponding to (002) spacing of amorphous carbon. It was also reported that several artificial humic acids prepared from anthraquinone, hydroxyanthraquinone. charcoal. anthracite etc. showed high similarity to A type humic acid in their spectrophotometric properties and stability toward oxidizing reagent (3).Keywords
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