Method of definition of degree of hydration in multicomponent heterogeneous disperse systems
Keywords:
microwave dielectrometry, hydration, nanodiamonds, BSAAbstract
The method of calculation of the hydration in multicomponent heterogeneous disperse systems is presented. An example of the three-component disperse system representing the aqueous solution of bovine serum albumin (BSA), containing ultra dispersed nanodiamonds, the calculation of hydration on the experimental values of dielectric permittivity of the samples was carried out. The values of complex permittivity of the aqueous solutions of BSA (1 wt. %) in presence of nanodiamonds (0-3,15 wt. %) were measured by the method of microwave dielectrometry on the frequency of 9.2 GHz. Using the Debye equations the values of static permittivity of the samples used for the calculation of hydration were determined. The hydration increases at the adding of nanodiamonds to the protein solution up to the concentration of 1.8 wt. %. It can be explained by the strong ability of nanodiamonds to bind water. Hydration decreases at a further increase in the concentration of nanodiamonds that can be caused by the aggregation of particles.
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