Natural Treasure - Humic Acid


Humic substances are organic compounds that are important components of humus, the major organic fraction of soilpeat, and coal (and also a constituent of many upland streamsdystrophic lakes, and ocean water). For a long era in the 19th and 20th centuries, humic substances were often viewed through a lens of acid–base theory that described humic acids, as organic acids, and their conjugate baseshumates, as important components of organic matter. Through this viewpoint humic acids were defined as organic substances extracted from soil that coagulate (form small solid pieces) when a strong-base extract is acidified, whereas fulvic acids are organic acids that remain soluble (stay dissolved) when a strong-base extract is acidified.But humic acids in isolation are the result of chemical extraction from the soil organic matter, and in recent decades their importance in nature (as opposed to in the laboratory) was brought into question, since they are products of a chemical procedure.New definitions rather refer to the components of the soil organic matter as humic substances (not acids) or in a continuum of organic compounds in a supramolecular frame and suggest that the term "humic acids" should be avoided.This is not because the acid–base potentials of humic substances are untrue but rather because by themselves they do not provide a complete theoretical framework to describe or explain all aspects of soil organic matter chemistry. For example, a humic substance may play a hormonal role in plant development without being coagulated by an acid–base reaction.

humic acid