Study of Humic Fractions from Water of an Antarctic Lake

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Abstract
Soluble humic compounds isolated from water of an Antarctic lake have been characterized by IR, NMR spectrophotometry and fluorimetric measurements. Gel chromatography on Sephadex G resins of fulvic acids, present in the water in high concentration, has evidenced that a great fraction of them consists of compounds having molecular weight greater than 50,000 dalton. The high level of humics and the presence in soluble form of compounds having high molecular weight and similar structure to the humic acids of lake sediments may be due to the high pH value of the water examined.