Amino-acids in humic,nitrohumic and nitrofuvic acids from coal |
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Authors: | Rafael Moliner Jose M Gavilan |
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Affiliation: | Instituto de Carboquimica, CSIC Apartado, 589, Zaragoza-5, Spain |
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Abstract: | The humic acids, HA, extracted from a Spanish lignite and the nitrohumic acids, NHA, and nitrofulvic acids, NFA, extracted from the same lignite after its nitration, are hydrolysed with 6N HCI under reflux. The α-amino acids present in the hydrolysates are determined and thirteen α-amino acids are identified. The amounts of nitrogen in the amino-acids released by the hydrolysis increase according to the sequence: NFA > NHA > HA. |
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