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Thermal characterization of natural and synthetic humic substances |
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| Authors: | P. Ioselis Y. Rubinsztain R. Ikan Z. Aizenshtat M. Frenkel |
| Affiliation: | 1. Department of Organic Chemistry, Laboratory of Natural Products, Hebrew University of Jerusalem, Jerusalem 91904, Israel;2. Energy Research Center, and Casali Institute for Applied Chemistry, Hebrew University of Jerusalem, Jerusalem 91904, Israel |
| Abstract: | Thermogravimetric technique was used for the characterization of natural (humic) and synthetic (melanoidins) substances. The influence of pH on the thermal stability of humic substances was studied. A similarity in thermal behaviour of natural humic substances and of melanoidins (prepared from an excess of sugar) and the unique thermal properties of melanoidins (prepared from basic amino acids) was observed. Thermal behavior of natural and synthetic substances was compared with model compounds of sugar, peptide and kerogen types. |
| Keywords: | humic substances humic acid melanoidins thermogravimetry pH influence model compounds |
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