FIELD: chemistry.
SUBSTANCE: method of determining the diffusion coefficient of solvents in massive products from orthotropic capillary-porous materials consists in the creation in the sample under analysis of an even initial content of a solvent distributed in the solid phase , bringing the flat sample surface in contact with a solvent dose source, measuring the change of a galvanic converter signal in time, determination of the time of reaching the maximum on the curve of the galvanic converter EMF change and the calculation of the diffusion coefficient, pulse influence on the flat surface of the product under analysis with the dose of the solvent is realised on a straight line in a specified direction of an orthotropic material, electrodes of the galvanic converter are made in the form of rectilinear segments which are placed from both sides of the line of the pulse influence on straight lines, parallel to the line of the pulse influence and located at an equal specified distance from it, and the required coefficient is calculated by a specified formula.
EFFECT: providing the possibility to control the accuracy increase and determination of the diffusion coefficient in different directions of the orthotropic capillary-porous material.
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