Molecular parameters of humic acids

Several molecular parameters of humic acids isolated from the soils of the most important genetic types are discussed.The material obtained makes it possible to establish limiting values of the molecular weights of humic acids and indicate the tendencies in their changes.The selected parameters characterise the submolecular, molecular and supramolecular levels of the organisation of humic acids. It has been shown that the most important indices include the molecular-weight distribution, molecular weight and the molecular form of humic acids.