To study the effect of pectin on the nature of the crystallization of calcium phosphates from a model solution of extracellular fluid

The paper presents the results of studies of crystallization of calcium phosphates in the presence of pectin. The conditions of formation of the organo-mineral composite hydroxylapatite-pectin are established. By increasing the time the precipitate is kept in solution and reducing the pectin content in the initial model ash, the content of crystallized hydroxylapatite in the organic-mineral composite increases and the content of calcium phosphates, including amorphous calcium phosphate decreases. Increasing the content of pectin in the original model ash from 0.01 to 0.1 mass.% leads to an increase in the resorption of OMK in 0.9 mass.% sodium chloride solution. Temperature transformations are investigated and it is established that in the process of heat treatment of synthesized samples in the temperature range of 200-600 ° C, the mass loss of samples occurs due to dehydration of hydroxylapatite, calcium phosphates and destruction of pectin.