We show that the concentration profiles in the subdiffusive system with a membrane, which separates a homogeneous solution from a pure solvent at an initial moment, has a general scaling form in the long time limit C\sim t^\lambda F(\delta /t^\rho ), where \delta is a distance from the membrane surface. There is also derived the relation involving the subdiffusion parameters of the medium and the membrane with the scaling parameters \lambda and \rho , which are measured experimentally. The relation allows one to extract the subdiffusion parameters of the system from experimental data.

PACS numbers: 02.50.--r, 89.75.Da