Silica sorbents were prepared and investigated by small-angleneutron scattering (SANS). The surface area, pore volume, mean pore diameter andthickness of the pore walls determined by traditional adsorption technique arecompared with the mean radius or correlation length determined by SANS method.The pore size determined by adsorption methods is far from the values of thescattering object size obtained by SANS method. It is supposed that thescattering objects in SANS are not pores but the walls of the pores.
